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Rådberg, Malin. "Design of Experiment for Laser cutting in Superalloy Haynes 282." Thesis, Karlstads universitet, Science, Mathematics and Engineering Education Research (SMEER), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-44516.
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This project aims to investigate the effect of varying different laser cutting parameters on the laser cut surface. The parameters that were varied were cutting speed, beam effect, gas pressure and focal point. The statistical method Design of Experiment was used to plan the experiments and two full factorial test plans were set up, one with argon as cooling and protective gas and one with nitrogen. Sheet metal consisting of the superalloy HAYNES ® 282 with a thickness of 2,54 mm was investigated. Samples from the material were cut with different laser cutting parameters according to the test plans. The samples were evaluated by measuring cracks, recast layer thickness, surface irregularity, burr height and distance to beam deflection point on the cut surface. The resulting data was inserted as responses into the statistical program Modde 10.1 for analysis. Modde 10.1 provided models of high significance for the responses of Recast layer, Tav; Recast layer, Tmax; Burrheight, max and Distance to deflection point for the argon series and Recast layer, Tav and Recast layer, Tmax for the nitrogen series. The results showed that both recast layer thickness and burr height decreases with increased values of cutting speed, gas pressure and focal point as well as decreased values of beam effect within the parameter window investigated. They also showed that distance to deflection point increased with increasing values of gas pressure and focal point and with decreased values of cutting speed and beam effect within the parameter window. The results also showed that for the samples cut with argon as cooling and assistant gas the parameters that affects the recast layer thickness the most are focal point and gas pressure, whereas for the nitrogen series it is gas pressure and beam effect. The parameter with greatest effect on burr height is the cutting speed and for the distance to deflection point it is focal point and gas pressure that have the greatest effect. When comparing the argon and the nitrogen series to each other it can be seen that the argon series generate less recast layer from the entry of the cut until between 60 – 80 % into the cut, after which the argon series bypasses the nitrogen series in amount of recast layer produced in the cutting process in the majority of the places measured.Projektet syftar till att undersöka effekten på den laserskurna ytan då laserskärningsparametrar varieras. Parametrarna som varierades var skärhastighet, lasereffekt, gastryck och fokalpunkt. Den statistiska metoden Design of Experiments användes för att planera experimenten. Två stycken fullskaligt faktoriella försöksplaner skapades, en med argon som skärgas och en med kväve som skärgas. Undersökningen gjordes på plåt bestående av superlegeringen HAYNES ® 282 med en tjocklek på 2,54 mm. Provbitar från materialet skars ut utifrån försöksplanerna med olika laserinställningar under skärprocessen. Provbitarna utvärderades genom att mäta sprickor, tjockleken på det omsmälta materialet, ytojämnheten, gradhöjden och avståndet till laserstrålens avböjningspunkt på den laserskurna ytan. Resultaten användes för analys i det statistiska programmet Modde 10.1. Modde 10.1 bidrog med modeller av hög signifikans för responserna Recast layer, Tav; Recast layer, Tmax; Burrheight, max and Distance to deflection point för argonserien och Recast layer, Tav och Recast layer, Tmax för kväveserien. Resultaten visar att både tjockleken på omsmält material och gradhöjden avtar med ökande värden på skärhastighet, gastryck och fokalpunkt samt minskande värden på lasereffekt inom det undersökta parameterfönstret. De visade också att till laserstrålens avböjningspunkt på den laserskurna ytan ökade med ökande värden på gastryck och fokalpunkt och med minskande värden på skärhastighet och lasereffekt inom parameterfönstret. Resultaten visade också att de parametrar som i störst utsträckning påverkar tjockleken på det omsmälta materialet för provbitarna i argonserien är fokalpunkt och gastryck, medan det för kväveserien är gastryck och lasereffekt. Parametern som har högst inverkar på gradhöjden är skärhastigheten, medan fokalpunkt och gastryck har störst effekt på avståndet till laserstrålens avböjningspunkt på den laserskurna ytan. Om kväveserien och argonserien jämförs med varandra kan det observeras att argonserien generellt genererar mindre omsmält material än kväveserien från det att laserstrålen träder in i materialet till dess att den är mellan 60 och 80 % in i snittet, vartefter argonserien går förbi kväveserien i mängd omsmält material på majoriteten av mätställen.
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Hirko, Jeffrey George. "CONDUIT ORIGIN AND PALEOHYDROLOGY OF HAYNES CAVE: MONROE COUNTY, WEST VIRGINIA." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1336097022.
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Osoba, Lawrence. "A study on laser weldability improvement of newly developed Haynes 282 superalloy." Material Characterization Vol. 65(2012), p. 93 - 99, 2012. http://hdl.handle.net/1993/8156.
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Haynes alloy 282 is a new gamma prime (γ’) precipitation strengthened nickel-base superalloy developed for high temperature applications in land-based and aero turbine engines. Joining is a crucial process both during the manufacturing of new components and repair of service-damaged turbine parts. Unfortunately, the new superalloy cracks during laser beam welding (LBW), which is an attractive technique for joining superalloys components due to its low heat input characteristic that preclude the geometrical distortion of welded components. This research is therefore initiated with the goal of studying and developing an effective approach for preventing or minimizing cracking during LBW of the new superalloy Haynes 282. Careful and detailed electron microscopy and spectroscopy study reveal, for the first time, the formation of sub-micron grain boundary M5B3 particles, in the material. Microstructural study of welded specimens coupled with Gleeble thermo-mechanical physical simulations shows that the primary cause of weld heat affected zone (HAZ) cracking in the alloy is the sub-solidus liquation reaction of intergranular M5B3 borides in the material. Further weldability study showed that the HAZ liquation cracking problem worsens with reduction in welding heat input, which is normally necessary to produce the desired weld geometry with minimum distortion. In order to minimize the HAZ cracking during low heat input laser welding, microstructural modification of the alloy by heat treatment at 1080 - 1100oC has been developed. The pre-weld heat treatment minimizes cracking in the alloy by reducing the volume fraction of the newly identified M5B3 borides, while also minimizing non-equilibrium grain boundary segregation of boron liberated during dissociation of the boride particles. Further improvement in resistance to cracking was produced by subjecting the material to thermo-mechanically induced grain refinement coupled with a pre-weld heat treatment at 1080oC. This approach produces, for the first time, crack-free welds in this superalloy, and the benefit of this procedure in preventing weld cracking in the new material is preserved after post-weld heat treatment (PWHT), as additional cracking was not observed in welded specimens subjected to PWHT.
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Deutschländer, Robert [Verfasser], Michael [Gutachter] Pauen, John-Dylan [Gutachter] Haynes, and Albert [Gutachter] Newen. "Alltagsintuitionen zur Willensfreiheit / Robert Deutschländer ; Gutachter: Michael Pauen, John-Dylan Haynes, Albert Newen." Berlin : Humboldt-Universität zu Berlin, 2018. http://d-nb.info/1185175091/34.
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Veverková, Jana. "Effects of long-term high temperature exposure on the microstructure of haynes alloy 230." Thesis, University of Leicester, 2010. http://hdl.handle.net/2381/8333.
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Haynes Alloy 230 is a nickel-based sheet material used for combustor components in a number of small industrial gas turbines manufactured by Siemens. During normal operating service the material is subjected to high temperatures and cyclic mechanical and thermal stresses, which can lead to degradation of the microstructure and mechanical properties of the alloy, and hence limit component design life. This PhD thesis describes studies of the effects of long-term high temperature exposure on hardness and microstructural changes in creep rupture tested and thermally exposed samples of HA230. Advanced FEGSEM was used for documentation of the microstructural evolution in the temperature range of 500-1170°C following exposure up to 30000 hours. For identification of alloy phases, which could potentially act as indicators of the average exposure temperatures experienced for specific service periods, XRD and analytical TEM techniques were used. Primary carbides M12C and secondary carbides, M12C and M23C6, were identified. No TCP phases were observed within the microstructure of the tested samples, but the secondary M23C6 forms large ‘pool-like’ precipitates’ above 990°C which are very hard and brittle and could be detrimental for the material (e.g. reductions in ductility, high temperature strength). A hardness and microstructurally based model was used for the assessment of an ex-service HA230 transition duct and could be an aid for evaluation of the remnant life of HA230 combustor components. The tests were carried out as part of the COST 538 technology programme between 2004 and 2009.
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Frye, Matthew. "Influential Factors on Historic Interpretation: A Case Study of Tipton-Haynes State Historic Site." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/etd/3718.
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Influences on the interpretation of Tipton-Haynes State Historic Site have caused many alterations to the site and the presentation of its history. Scholars have described how public history sites have continually expanded their interpretations as growing desires and interests from external influences such as the general public, state agencies, and donors. However, Tipton-Haynes has also faced many internal influences. While the creators of the site aided in the limitation and exclusion of the site’s vital history, over time the involvement and opinions of the board of trustee members, directors, and staff shaped an increasingly inclusive and expansive interpretation of the site. Therefore, the experience at Tipton-Haynes suggests that scholars should also consider the innerworkings of a historic site and the opinions of not just the community but also the opinions and choices of the people involved in the site and its creation. The inclusivity allows for a more expansive history while also creating new connections between the history of Tipton-Haynes and the general public.
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Rodelas, Jeffrey M. "Friction Stir Processing of Nickel-base Alloys." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1341512683.
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Bogler, Carsten [Verfasser], John-Dylan [Akademischer Betreuer] Haynes, Philipp [Akademischer Betreuer] Sterzer, and Peter [Akademischer Betreuer] König. "Saliency processing in the human brain / Carsten Bogler. Gutachter: John-Dylan Haynes ; Philipp Sterzer ; Peter König." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2014. http://d-nb.info/1058645048/34.
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Trabelsi, Mariem. "Propagation de fissures en fatigue oligocyclique multiaxiale à haute température pour le superalliage HAYNES® 188." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEM952.
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Cette étude s’inscrit dans le cadre du projet ANR SEMAFOR (ANR-14-CE07-0037) (Simulation et caractérisationExpérimentale de la FissuratiOn en plasticité généRalisée) en partenariat avec l’ONERA, LMT Cachan et SAFRAN. Sous les conditions de hautes températures, certaines pièces aéronautiques subissent des chargements sévères nécessitant de prendre en compte la propagation de fissures de fatigue pour optimiser le dimensionnement et la sécurité des pièces. L’intensité des chargements et des températures provoquent une forte plastification dans la zone de propagation de fissures. Le matériau de l’étude est un superalliage à base de Cobalt, le HAYNES® 188, utilisé principalement pour les chambres de combustion aéronautiques. Cette étude consiste à caractériser expérimentalement la propagation de fissure en fatigue oligocyclique sous sollicitations biaxiales. La conception d’un essai original de propagation de fissure à haute température est développée pour des chargements biaxiaux coplanaires. Un inducteur de type pancake a été conçu afin de réduire le gradient thermique dans la zone centrale de l’éprouvette. Ce dispositif a été utilisé pour construire une étude approfondie d’essais biaxiaux dans les conditions de fatigue oligocyclique à haute température. Les mesures des champs de température par thermographie infra-rouge et une méthodologie expérimentale ont ainsi été mises en place afin d’appréhender au mieux les conditions de propagation de fissure. La détermination expérimentale des vitesses de propagation de fissures est l’un des objectifs majeurs de l’étude. Les essais ont été modélisés à l’aide de calculs par éléments finis. Un post-processeur, sans insertion de fissure, a permis de valider un modèle macroscopique de propagation de fissure basé sur des grandeurs énergétiques. A l’aide d’outils de remaillage conforme, la propagation de fissure a été modélisée par introduction explicite de la fissure observée expérimentalement. Cette démarche a permis d’analyser les grandeurs mécaniques pilotant la propagation de fissure de fatigue sous les conditions de plasticité étendue à haute température, afin d’établir des outils de modélisation 3D de propagation de fissure expliciteThis study is concerned with the SEMAFOR (ANR-14-CE07-0037) project in collaboration with ONERA, Mines ParisTech,LMT Cachan and Safran. In very high temperature condition, as found for some engine aircraft components, crack couldinitiate near perforated zones. Once a crack is initiated, further degradation by crack growth is the result of a complex setof phenomena: multiaxial fatigue loading, thermal gradients and large scale yielding under oxidizing environment. The purpose of this study is to analyse the fatigue crack growth of the superalloy HAYNES® 188 under such conditions wit hbiaxial tests. The design of an original experiment is a challenging issue to conduct biaxial tests at high temperature. A specific inductor (pancake) was designed to decrease thermal gradient within the gage length. Subsequent thermalfield has been measured using Infra-red thermography. An experimental methodology was developped to ensure a deep analysis of the crack growth. One of our major purpuse is the determination of the experimental fatigue crack growth rate in such conditions. A finite element numerical analysis was achieved using a post-processing methodology based onenergy partition. This model has been successfully validated, at first without crack insertion, for cruciform specimen tests with neither modification of the model constitutive parameters. Using consistent remeshing tools, crack propagation was modeled by explicit introduction of the crack observed experimentally. This approach leads to analyze the mechanical quantities controlling the fatigue crack growth under large scale yielding at high temperature, in order to establish tools for3D modeling of explicit crack propagation
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Graneix, Jérémie. "Étude du soudage LASER Yb : YAG homogène et hétérogène des superalliages Hastelloy X et Haynes 188." Thesis, Toulouse, INPT, 2015. http://www.theses.fr/2015INPT0114/document.
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De nos jours, la complexité des pièces mécaniques est de plus en plus grande dans de nombreux secteurs industriels de pointes tels que l’aéronautique, l’aérospatiale ou bien encore le domaine médical. Pour répondre à ces nouvelles exigences, notamment en termes de géométrie, de nouvelles techniques de conception et de fabrication automatisées intègrant également une meilleure traçabilité des pièces, sont mises en place. Ce travail de thèse s’est inscrit dans un projet partenarial entre le Laboratoire Génie de Production de l’ENIT et la société EXAMECA, spécialiste de pièces chaudronnées pour l’aéronautique. L’étude a porté plus précisément sur l’assemblage permanent de pièces en superalliages par soudage LASER pour la réalisation d’une nouvelle chambre de combustion de turbomachine. Les assemblages des différentes parties de la chambre de combustion sont actuellement réalisés par procédé TIG (Tungsten Inert Gas), encore appelé procédé GTAW (Gas Tungsten Arc Welding), de manière manuelle ou semi-automatique avec fil d’apport de la même nuance que le superalliage base nickel. Même si cette technique industrielle est éprouvée, elle peut générer encore des problèmes de non-conformité car elle requière une grande dextérité des opérateurs pour éviter notamment les déformations importantes des pièces chaudronnées. L’étude avait donc pour objectif d’évaluer la pertinence du procédé de soudage LASER Yb : YAG pour l’assemblage homogène et hétérogène des superalliages Hastelloy X et Haynes 188 sans métal d’apport. Le procédé de soudage autogène à l’aide d’une source LASER disque Yb : YAG est encore relativement récent dans l’industrie même s’il semble offrir de nouvelles perspectives intéressantes. Une première partie de l’étude a permis de caractériser la caustique du faisceau LASER afin de déterminer des paramètres clés lors du soudage que sont par exemple la forme et la taille du spot LASER, la répartition de la densité de puissance à la surface de la pièce ou au point focal par exemple. Cette étape finalisée, les domaines de soudabilité des assemblages homogènes des superalliages Hastelloy X et Haynes 188 et des assemblages hétérogènes Hastelloy X - Haynes 188 ont été déterminés. L’influence des principaux paramètres de soudage sur la géométrie (forme et taille) et la tenue mécanique des cordons a pu être identifiée. Des conditions optimales de soudage ont été établies pour les différentes conditions de soudage. Une étude métallurgique des cordons optimisés, obtenus pour les différentes configurations, a été menée à différentes échelles. Elle a permis de déterminer des relations entre d’une part, les paramètres et les modes de soudage (conduction ou keyhole) et d’autre part, entre les modes de soudage et les microstructures des différentes zones des cordons qui conditionnement leurs propriétés mécaniquesNowadays, the complexity of mechanical parts is becoming more and more important in numerous cutting-edge insdustries such as aeronautics, aerospace or the medical field. To meet such new requirements, particulary in terms of geometry, innovative conception and automated manufacturing techniques, integrating as well a better traceability of parts, are implemented. This thesis is in partnership with The LGP (Laboratoire Génie de Production) of the National Engineering School of Tarbes (ENIT) and EXAMECA, a company specialized in boiler making for aerospace applications. The study essentially focused on permanent assembly of superalloy parts by LASER welding, in order to develop a new turbomachinery combustion chamber. Assembly of different parts of the combustion chamber are presently performed by TIG (Tungsten Inert Gas) process, or GTAW (USA : Gas Tungsten Arc Welding) process. This manufacturing phase is realized in a manual mode with semi-automatic equipment providing the wire with a similar grade as the nickel base superalloy. Even though this industrial process has been proven, it can still cause noncompliance issues because it requires great dexterity from operators to avoid important deformations of welded parts. Therefore, this study aimed at evaluating the relevance of LASER Yb : YAG welding process, for homogeneous and heterogeneous assembly of Hastelloy X and Haynes 188 superalloys, without filler metal. Autogeneous welding process associated with LASER Yb : YAG disc source is still relatively new in the industry even though it seems to offer very promising perspectives. A first part of the study is dedicated to LASER beam’s caustic characterization, in order to determine key parameters for welding, including shape and size of LASER spot, power density distribution on the surface or at focal point. Once this phase was completed, fields of weldability of homogeneous assemblies of Hastelloy X and Haynes 188 superalloys as well as heterogeneous assemblies of Hastelloy X / Haynes 188 have been determined. Impact of main welding parameters on geometry (shape and size) and mechanical strength beads were identifed. Optimal welding conditions have been established for different welding conditions. A metallurgical study on optimized beads, obtained for different configurations, has been carried out at different scales. It allowed determining relationships between parameters and welding modes (conduction or keyhole), but also between welding modes and microstructures of different beads areas that condition mechanical properties
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Wallroth, Raphael [Verfasser], Kathrin [Gutachter] Ohla, John-Dylan [Gutachter] Haynes, and Rasha Abdel [Gutachter] Rahman. "The Neural Representation of Taste Perception / Raphael Wallroth ; Gutachter: Kathrin Ohla, John-Dylan Haynes, Rasha Abdel Rahman." Berlin : Humboldt-Universität zu Berlin, 2019. http://d-nb.info/1189069547/34.
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Vattappara, Kevin. "Understanding the effect of temperature and time on Gamma prime coarsening for Nickel-base superalloy Haynes 282." Thesis, KTH, Materialvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259774.
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Haynes 282 is a gamma prime (𝛾′)-strengthened nickel base superalloy developed in 2005, exhibiting a good combination of high temperature properties and fabricability. Microstructural features such as 𝛾′ and carbides play an important role in deriving the mechanical properties of the alloy during heat treatment. As Haynes 282 is a relatively new alloy with insufficient literature availability, the present thesis is aimed at studying the evolution of microstructure for different heat treatment times and temperature with a special focus on 𝛾′ phase precipitation kinetics with different initial conditions for the material. The study is divided into two sections with objectives which are focused on the different ends to the heat-treatment time scales. The first objective of this study was to investigate γ' precipitation at short heat treatment times and develop Time-Temperature Precipitation (TTP) and Hardness (TTH) diagrams for Haynes 282 using a novel arc heat treatment. In this technique, a steady state temperature gradient, covering room temperature to liquidus, was created using stationary TIG arc on a disc mounted on a water-cooled chamber. Aged and solutionized samples were arc heat treated for 1.5 minutes, 30 minutes and 4 hours. The study was complemented with temperature modelling, thermodynamic calculations, and 𝛾′ precipitation simulation. A unique graded microstructure formed, consisting of dendritic region in fusion zone; dissolution area of all phases including MC carbides, grain boundary carbides, and 𝛾′; grain boundary carbide zone, 𝛾′ band; and base metal. 𝛾′ precipitate size increased with increasing time and temperature. 𝛾′ precipitation simulation model was developed, and it showed very good agreement with experimental results. Finally, the results were summarized in TTH and TTP diagrams. The second objective in this work was to study understand the coarsening behaviour of 𝛾′ phase with an initial pre-heat-treated GKN heat treatment using furnace heat treatment. Isothermal heat treatments for temperatures from 800°C to 1120°C and times from 30 seconds to 96 hours were performed. Morphological changes in 𝛾′ phase, particle size distribution, grain sizes and hardness on these isothermal heat-treated states are presented in this work. Additionally, A TC PRISMA precipitation model was evaluated to predict 𝛾′sizes and compare it with the measurements. It was concluded that complex initial microstructure, containing bimodal distribution of 𝛾′ precipitates, caused deviations between predicted and measured values, while the model, in the previous objective, predicted the sizes in close approximation to the experimental values. Therefore, further understanding and development of precipitation kinetics with the software should be done to achieve closer results to the experiment.Haynes 282 är ett gamma prime (𝛾′) - förstärkt superlegering av nickelbas som utvecklades 2005 och uppvisar en god kombination av högtemperaturegenskaper och tygbarhet. Mikrostrukturella egenskaper såsom 𝛾′ och karbider spelar en viktig roll för att få de mekaniska egenskaperna hos legeringen under värmebehandling. Eftersom Haynes 282 är en relativt ny legering med otillräcklig litteraturtillgänglighet syftar den aktuella avhandlingen till att studera utvecklingen av mikrostruktur för olika värmebehandlingstider och temperatur med ett särskilt fokus på 𝛾′ fasutfällningskinetik med olika initiala förhållanden för materialet. Studien är uppdelad i två sektioner med mål som är inriktade på de olika ändarna på värmebehandlings tidsskalorna. Det första syftet med denna studie var att undersöka 𝛾′nederbörd vid korta värmebehandlingstider och utveckla Time-Temperature Precipitation (TTP) och Hardness (TTH) diagram för Haynes 282 med användning av en ny bågvärmebehandling. I denna teknik skapades en jämn temperaturgradient, som täcker rumstemperatur till liquidus, med användning av stationär TIG-båge på en skiva monterad på en vattenkyld kammare. Åldriga och lösningsbara prover bågvärmebehandlades under 1,5 minuter, 30 minuter och 4 timmar. Studien kompletterades med temperaturmodellering, termodynamiska beräkningar och 𝛾′utfällningssimulering. En unik graderad mikrostruktur bildad, bestående av dendritisk region i fusionszon; upplösningsområde för alla faser inklusive MC-karbider, korngränsande karbider och 𝛾′; korngränsen karbidzon, 𝛾′ band; och oädel metall. 𝛾′utfällningsstorlek ökade med ökande tid och temperatur. 𝛾′utfällningssimuleringsmodell utvecklades, och den visade mycket bra överensstämmelse med experimentella resultat. Slutligen sammanfattades resultaten i TTH- och TTP-diagram. Det andra syftet med detta arbete var att studera förstå det förgrovning beteendemönster hos 𝛾′ fasen med en initial förvärmebehandlad GKN-värmebehandling med ugnsvärmebehandling. Isotermiska värmebehandlingar för temperaturer från 800 ° C till 1120 ° C och gånger från 30 sekunder till 96 timmar utfördes. Morfologiska förändringar i 𝛾′fasen, partikelstorleksfördelning, kornstorlekar och hårdhet på dessa isotermiska värmebehandlade tillstånd presenteras i detta arbete. Dessutom utvärderades en TC PRISMA-nederbördsmodell för att förutsäga 𝛾′ storlekar och jämföra den med mätningarna. Det drogs slutsatsen att komplex initial mikrostruktur, innehållande bimodal fördelning av 𝛾′-fällningar, orsakade avvikelser mellan förutspådda och uppmätta värden, medan modellen i det tidigare målet förutspådde storleken i nära anpassning till experimentvärdena. Därför bör ytterligare förståelse och utveckling av utfällningskinetik med programvaran göras för att uppnå närmare resultat till experimentet.
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Hiuhu, John. "Shear spinning of nickelbased super alloys and stainless steel." Thesis, Högskolan Väst, Avdelningen för maskinteknik och naturvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-8685.
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Shear spinning of Haynes 282, Alloy 718, Alloy 600 and AISI 316L was done using several tool feeds and mandrel clearances. Multi passing of the materials was limited due to strain hardening and circumferential cracking except for AISI 316L. The effect of the tool feed and the mandrel clearance on the successful forming of the materials was established. The successfully spun samples were solution heat treated at varying temperatures and holding times to establish a range of grain sizes and hardness levels. An aging heat treatment process was performed for Haynes 282 and Alloy 718 to achieve precipitation strengthening. The micro hardness measurements were conducted for the materials prior to spinning and after spinning. The same was also done after the various heat treatment processes. Grain size mapping was conducted by the use of lineal intercept methods. Comparison of the results in terms of grain sizes and hardness values was done. The temperature ranges suitable for full recrystallization of the materials after the shear spinning were identified and the effect of the holding times on the grain growth established. Comparison with unspun samples showed that the heat treatment times required to achieve comparative hardness and grain sizes were distinctively different.
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Quigley, Sean. "A QUANTITATIVE STUDY OF THE WELDABILITY OF INCONEL 718 USING GLEEBLE AND VARESTRAINT TEST METHODS." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/630.
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Nickel super alloy Inconel 718 was tested and compared to Haynes 230 using Gleeble and Varestraint mechanical test methods. Hot cracking susceptibility was examined in either alloy using a sub-scale Varestraint test method at 5 augmented strain levels: 0.25%, 05.%, 1%, 2%, and 4%. Maximum crack length, total crack length, and number of cracks were measured for each strain level. Gleeble hot ductility on-heating and on-cooling tests were performed on both alloys. Inconel 718 was tested on-heating at target temperatures of 1600˚F, 2000˚F, 2100˚F, 2200˚F, and on cooling at 1600˚F, 1700˚F, 1800˚F, 1900˚F, and 2100˚F. Haynes 230 was tested on-heating at target temperatures of 2050 ˚F, 2200 ˚F, 2240 ˚F, 2330 ˚F, and on-cooling at 1800 ˚F, 1900 ˚F, 1990 ˚F, 2040 ˚F, 2090 ˚F, 2100 ˚F, 2140 ˚F, and 2190 ˚F. Ductility in Gleeble samples was measured in a reduction of surface area. A nil-strength temperature was established for either alloy. The nil-strength temperature was 2251˚F and 2411˚F, for Inconel 718 and Haynes 230, respectively. The nil ductility temperature <5% R/A) was 2188˚F for Inconel 718 and 2341˚F for Haynes 230. Ductility recovery temperature occurred at 1924˚F for Inconel 718 and 2147˚F for Haynes 230. The brittle temperature range was determined to be 326˚F for Inconel 718 and 228˚F for Haynes 230. Varestraint testing revealed that Inconel 718 had a lower threshold strain for crack initiation than Haynes 230 (0.5% vs 1%), and a higher number of cracks, as well as a larger maximum crack length, at every strain level. These results show a greater tendency for liquation cracks to form in Inconel 718 than in Haynes 230.
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Stein, Timo [Verfasser], John-Dylan [Akademischer Betreuer] Haynes, Philipp [Akademischer Betreuer] Sterzer, and Naotsugu [Akademischer Betreuer] Tsuchiya. "Visual processing of social information during interocular suppression / Timo Stein. Gutachter: John-Dylan Haynes ; Philipp Sterzer ; Naotsugu Tsuchiya." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2012. http://d-nb.info/1025112334/34.
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Gramani, Giuliana. "Mudanças e permanências: a indústria cultural e os anos 60 em I\'m Not There, de Todd Haynes." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/8/8147/tde-06112014-115951/.
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O presente trabalho tem por objetivo analisar o filme Im Not There (Não estou lá, EUA, 2007), dirigido pelo norte-americano Todd Haynes. A análise terá como seu principal objetivo detectar o tema central da obra, que retrata a vida e carreira de Bob Dylan através de seis personagens bastante distintos. Para isso, serão observados mais minuciosamente três personagens da película, os mais ligados ao universo musical, a saber, o menino que se apresenta como Woody Guthrie, Jack Rollins e Jude Quinn. Os outros três personagens (Robbie Clark, Arthur Rimbaud e Billy the Kid) serão discutidos à medida que suscitam temas relevantes para a compreensão da obra. Tal análise permite concluir que o tema central de Im Not There é a indústria cultural. A partir disso, é possível então ver de que maneira essa questão é abordada pelo filme e como ela serve de ponto de partida para uma discussão mais ampla, sobre o panorama social e político da década de 1960 nos Estados Unidos. Por fim, será debatida a importância de um filme contemporâneo ter como mote os anos 60 e como o próprio Im Not There, enquanto objeto de cultura, se relaciona com a discussão que ele próprio propõe sobre a indústria culturalThe aim of the present work is to analyze the movie Im Not There (USA, 2007), by the American director Todd Haynes. The analysis will have as its main goal pinpointing the central theme of the movie, which portrays the life and career of Bob Dylan through six very distinct characters. Therefore, three characters will be thoroughly observed, the ones more closely connected to the musical universe, namely the boy who presents himself as Woody Guthrie, Jack Rollins and Jude Quinn. The other three characters (Robbie Clark, Arthur Rimbaud and Billy the Kid) will be discussed insofar as they raise relevant issues for understanding the film. This analysis leads to the conclusion that the main topic in Im Not There is the culture industry. It is thus possible to see in which way the movie deals with this issue and how the theme works as a starting point for a broader discussion concerning the social and political panorama of the 1960s in the United States. Finally, it is necessary to debate the importance of a contemporary movie having as its topic the 1960s and how Im Not There itself, as a cultural object, relates to the discussion it proposes regarding the culture industry
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Elmore, Clinton. "Comparing Structure from Motion Photogrammetry and Computer Vision for Low-Cost 3D Cave Mapping: Tipton-Haynes Cave, Tennessee." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/etd/3608.
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Natural caves represent one of the most difficult environments to map with modern 3D technologies. In this study I tested two relatively new methods for 3D mapping in Tipton-Haynes Cave near Johnson City, Tennessee: Structure from Motion Photogrammetry and Computer Vision using Tango, an RGB-D (Red Green Blue and Depth) technology. Many different aspects of these two methods were analyzed with respect to the needs of average cave explorers. Major considerations were cost, time, accuracy, durability, simplicity, lighting setup, and drift. The 3D maps were compared to a conventional cave map drafted with measurements from a modern digital survey instrument called the DistoX2, a clinometer, and a measuring tape. Both 3D mapping methods worked, but photogrammetry proved to be too time consuming and laborious for capturing more than a few meters of passage. RGB-D was faster, more accurate, and showed promise for the future of low-cost 3D cave mapping.
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Blons, Charles Roderick. "Research on a cognitive-relational theory of emotion ; a replication and extension of Smith, Haynes, Lazarus, and Pope /." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu148819059594201.
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Soon, Chun Siong [Verfasser], John-Dylan [Akademischer Betreuer] Haynes, and Thomas [Gutachter] Goschke. "The Unconscious Formation of Motor and Abstract Intentions / Chun Siong Soon ; Gutachter: Thomas Goschke ; Betreuer: John-Dylan Haynes." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/114073234X/34.
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Özdemir, Cavdaroglu Seda [Verfasser], John Dylan [Akademischer Betreuer] Haynes, André [Akademischer Betreuer] Knops, and Guido [Akademischer Betreuer] Hesselman. "Functional specialization in the brain : the case of numbers / Seda Özdemir Cavdaroglu. Gutachter: John Dylan Haynes ; André Knops ; Guido Hesselman." Berlin : Lebenswissenschaftliche Fakultät, 2016. http://d-nb.info/1090965672/34.
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Cavdaroglu, Seda Özdemir [Verfasser], John Dylan [Akademischer Betreuer] Haynes, André [Akademischer Betreuer] Knops, and Guido [Akademischer Betreuer] Hesselman. "Functional specialization in the brain : the case of numbers / Seda Özdemir Cavdaroglu. Gutachter: John Dylan Haynes ; André Knops ; Guido Hesselman." Berlin : Lebenswissenschaftliche Fakultät, 2016. http://d-nb.info/1090965672/34.
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Wisniewski, David [Verfasser], John-Dylan [Gutachter] Haynes, Marcel [Gutachter] Brass, and Henrik [Gutachter] Walter. "The neural correlates of intentional control : motivational effects and functional organization / David Wisniewski. Gutachter: John-Dylan Haynes ; Marcel Brass ; Henrik Walter." Berlin : Lebenswissenschaftliche Fakultät, 2016. http://d-nb.info/1101517832/34.
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Hebart, Martin [Verfasser], John Dylan [Akademischer Betreuer] Haynes, Philipp [Akademischer Betreuer] Sterzer, and Tobias [Akademischer Betreuer] Donner. "On the neuronal systems underlying perceptual decision-making and confidence in humans / Martin Hebart. Gutachter: John - Dylan Haynes ; Philipp Sterzer ; Tobias Donner." Berlin : Humboldt Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2014. http://d-nb.info/1049237218/34.
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Imamoglu, Fatma [Verfasser], Klaus [Akademischer Betreuer] Obermayer, John-Dylan [Akademischer Betreuer] Haynes, Christof [Akademischer Betreuer] Koch, and Olaf [Akademischer Betreuer] Hellwich. "Visual consciousness and corticocortical connectivity in the human brain / Fatma Imamoglu. Gutachter: Olaf Hellwich. Betreuer: Klaus Obermayer ; John-Dylan Haynes ; Christof Koch." Berlin : Technische Universität Berlin, 2014. http://d-nb.info/1065665652/34.
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Weygandt, Martin [Verfasser], John-Dylan [Gutachter] Haynes, Arno [Gutachter] Villringer, and Peter [Gutachter] Kirsch. "Computer-based diagnostic and prognostic approaches in medical research using brain MRI / Martin Weygandt. Gutachter: John-Dylan Haynes ; Arno Villringer ; Peter Kirsch." Berlin : Lebenswissenschaftliche Fakultät, 2016. http://d-nb.info/1110942028/34.
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Schultze-Kraft, Matthias Verfasser], Benjamin [Gutachter] Blankertz, John-Dylan [Gutachter] Haynes, and Klaus-Robert [Gutachter] [Müller. "Brain-computer interfaces for cognitive neuroscience and advanced mental state assessment / Matthias Schultze-Kraft ; Gutachter: Benjamin Blankertz, John-Dylan Haynes, Klaus-Robert Müller." Berlin : Technische Universität Berlin, 2016. http://d-nb.info/1156184428/34.
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Schultze-Kraft, Matthias [Verfasser], Benjamin Gutachter] Blankertz, John-Dylan [Gutachter] Haynes, and Klaus-Robert [Gutachter] [Müller. "Brain-computer interfaces for cognitive neuroscience and advanced mental state assessment / Matthias Schultze-Kraft ; Gutachter: Benjamin Blankertz, John-Dylan Haynes, Klaus-Robert Müller." Berlin : Technische Universität Berlin, 2016. http://d-nb.info/1156184428/34.
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Görgen, Kai [Verfasser], John-Dylan [Gutachter] Haynes, Benjamin [Gutachter] Blankertz, and Felix [Gutachter] Blankenburg. "On Rules and Methods: Neural Representations of Complex Rule Sets and Related Methodological Contributions / Kai Görgen ; Gutachter: John-Dylan Haynes, Benjamin Blankertz, Felix Blankenburg." Berlin : Humboldt-Universität zu Berlin, 2019. http://d-nb.info/1200406087/34.
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Pettersson, Viktor. "Study of the effect of process parameters in laser blown powder with superalloys : Varying laser power and scanning speed, analyzing material properties." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68698.
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Additive manufacturing (AM) is a growing process interesting many companies in many industries. Thereare multiple processes within the familty of AM, but this study focuses on laser blown powder (LBP). LBP involves a laser beam focused on the substrate with powder being blown into the laser beam. The laser beam melts both the powder and the surface of the substrate and as the laser beam moves and the melt pool solidies it leaves a bead of solid material behind. These beads are placed next to each other creating a layer which are then stacked, building the wanted geometry. As the method develops new materials are tested and this study analyses Haynes 282 powder onto Inconel 718 substrate. Multiple process parameters are involved in the LBP method and this study focuses on the impact of laser effect and scanning speed. Each value on the process parameters was inspired by previous reports with similar equipment and process. The laser effect ranges from 1600 W to 700 W, scanning speed ranges between 900 mm/min to 300 mm/min and the powder feeding rate was also varied from 4 g/min to 3 g/min. Each sample was built as a single bead and a multilayer specimen, which is ve layers and 16 beadswide at the bottom and 12 beads wide at the top. When analyzing the samples images from microscopes were mostly used for obtaining results. An image software called ImageJ allowed measurements in an image to obtain penetration depth or primary dendrite arm spacing. ImageJ also allowed measurements of porosity by turning the image binary and calculate the fraction of white and black. The results consists of numerical values and visual analysis of the bead geometry, minimum and maximum penetration, microstructure, porosity, hardness and cracks. The results show an increased bead width around 2 mm to 4 mm and decreased bead height around 0,2 mm to 0,7 mm of single beads with increased laser effect. Increased maximum penetration depth around, 200 μm to 500 μm, withincreased laser effect. More remelt between each deposited layer causing longer dendrites with increasinglaser effect. Porosity is decreased with an increased laser power, going from 0,04 % to 0,15 %. No distinct difference in hardness is observed between the samples, ranging between 255 HV to 310 HV. It is believed that aging causes the increased hardness right above the fusion zone. Cracks were found between dendrites and is believed to be caused by Laves-phases. Most results are comparable to previous similar studies, both as trends and numerical values. The statistics of the study is limited, meaning that all results should not be taken as granted but as a general guide line for more studies. The purpose and goals of the study has been met and completed.
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Schindler, Tanja [Verfasser], Marc [Akademischer Betreuer] Kesseböhmer, and Alan [Akademischer Betreuer] Haynes. "Generalized Strong Laws of Large Numbers for Intermediately Trimmed Sums for Non-negative Stationary Processes / Tanja Schindler. Betreuer: Marc Kesseböhmer. Gutachter: Marc Kesseböhmer ; Alan Haynes." Bremen : Staats- und Universitätsbibliothek Bremen, 2015. http://d-nb.info/1081765917/34.
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Guggenmos, Matthias [Verfasser], Philipp [Akademischer Betreuer] Sterzer, Klaus [Akademischer Betreuer] Obermayer, John-Dylan [Akademischer Betreuer] Haynes, and Stefan [Akademischer Betreuer] Pollmann. "Modulation of perceptual brain processes through learning and attention / Matthias Guggenmos. Gutachter: Philipp Sterzer ; Klaus Obermayer ; Stefan Pollmann. Betreuer: Philipp Sterzer ; Klaus Obermayer ; John-Dylan Haynes." Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1077247125/34.
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Selldén, Adam. "Evaluation of Heat Treatments for the Nickel-Based Superalloy Haynes® 282® Manufactured by Selective Laser Melting : A Study Based on Microstructural Examinations and Mechanical Testing." Thesis, Linköpings universitet, Konstruktionsmaterial, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-170844.
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Nickel-based superalloys have a wide range of applications, mainly in gas turbines for power generation and aircraft propulsion. They are superior to competing alloys in maintaining excellent mechanical properties for extended durations at extreme temperatures and loads, all while resisting corrosion and oxidation. Haynes 282 is a new age-hardenable nickel-based superalloy that is reported to have a remarkable combination of creep strength, thermal stability, weldability and formability that gives it potential for new applications. Additive manufacturing (AM) is often referred to as 3D printing and the term comprises a number of techniques with the commonality of producing components layer-by-layer with a 3D CAD model as basis. The AM methods allow for unprecedented design freedom and the possibility of replacing complex multi-part components with single part components. The AM methods also enable shorter lead times in many cases and repairs where only part of a component can be replaced instead of replacing the whole component. Selective laser melting (SLM) is a metal AM method that involves a metal powder bed and a laser beam that fuses the powder by melting it according to the predefined geometry. The aim of this project was to evaluate the effect of different heat treatments for Haynes 282 components produced by SLM and it was done by microstructural studies and mechanical testing. Comparisons were made between literature reports on the conventionally produced material, the as-manufactured SLM material and three different heat treatments of 1120-2h-WQ+1010-2h-AC+788-8h-AC, 1170-8hWQ+1010-2h-AC+788-8h-AC and 1170-8h-WQ+1010-4h-AC+788-8h-AC. The first one is recommended by Haynes for conventionally produced material. The microstructural studies focused on identifying occurring phases and their distribution. The grain boundary carbide precipitation after heat treatment was shown to be rather different from the conventionally produced material both in terms of carbide types and their distributions. Grain boundary carbide networks were formed after all the heat treatments. A fine intragranular distribution of a titanium-rich phase that could not be identified was found in all examined SLM specimens. The mechanical testing consisted of tensile testing at room temperature and 600°C, impact testing and hardness testing. The heat treated specimens exhibited remarkable strength but significant embrittlement that was believed to be caused by the grain boundary carbide networks.
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Al-Tameemi, Rasha S. "Societies Woven in Reeds: Reconstructing the Cultural Landscape of Nippur and the Iraqi Marshlands Through the Lens of John H. Haynes’s Photographic Catalog." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1559058549269583.
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Early, O. J. "“Mere Supplicants at the Gate”: Northeast Tennessee Politics in the Antebellum Era." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etd/3023.
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Antebellum political historians have long studied the era between Andrew Jackson’s election and the secession crisis through the colored knowledge of the Civil War. This project is an effort to reverse that trend. It explores northeast Tennessee’s political culture from the late 1830s through the start of the Civil War. It reveals that the Second American Party System, a wave of new enfranchised voters, and the area’s demographics mixed together to lay a foundation for the aggressive and populist political style that permeated the region from the 1830s through the 1850s. At the heart of these issues was the transition of power from East Tennessee to Middle Tennessee. As a way to analyze the region’s political culture, I look specifically at Democrats Andrew Johnson and Landon Carter Haynes and Whigs William Brownlow and Thomas Nelson.
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WU, QUANYAN. "MICROSTRUCTURAL EVOLUTION IN ADVANCED BOILER MATERIALS FOR ULTRA-SUPERCRITICAL COAL POWER PLANTS." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1154363707.
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Rouillard, Fabien. "MÉCANISMES DE FORMATION ET DE DESTRUCTION DE LA COUCHE D'OXYDE SUR UN ALLIAGE CHROMINOFORMEUR EN MILIEU HTR." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2007. http://tel.archives-ouvertes.fr/tel-00297246.
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Le superalliage à 22%mas. en chrome, Haynes 230®, est un matériau candidat pour les échangeurs de chaleur (température maximale 850°C-950°C) des Réacteurs à Caloporteur Gaz, également appelés HTRs (High Temperature Reactors). Dans l'optique de valider les performances de cet alliage, il faut garantir sa résistance à la corrosion dans l'environnement d'hélium impur de ces réacteurs. Dans cet objectif, la réactivité de surface de l'Haynes 230® a été examinée à des températures comprises entre 850 et 1000°C. On s'est attaché à caractériser l'influence de différents paramètres tels que concentrations en impuretés du gaz (monoxyde de carbone, méthane et rapport vapeur d'eau/dihydrogène), caractéristiques de l'alliage (activités en Cr et en C, teneurs en éléments mineurs) et température d'exposition. Deux principaux comportements ont pu être mis en évidence : la formation d'une couche d'oxyde riche en Cr et Mn à 900°C et sa réduction à plus hautes températures. A 900°C, la vapeur d'eau est l'oxydant principal. Toutefois dans les temps initiaux, le monoxyde de carbone réagit à l'interface métal/oxyde ce qui implique un transport de gaz au travers de la couche ; CO semble préférentiellement oxyder les éléments mineurs aluminium et silicium. A partir d'une température critique TA, le carbone en solution dans l'alliage réduit l'oxyde de chrome. Un modèle de destruction de la couche basé sur les grandeurs thermodynamiques interfaciales de l'alliage, la morphologie de la couche et la pression partielle en monoxyde de carbone dans l'hélium est proposé puis validé.
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Oballa, Phanuel O. "Genetic variation within Acacia karroo Hayne." Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334928.
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Chomette, Sébastien. "Etude des évolutions microstructurales et comportement mécanique des alliages base nickel 617 et 230 à haute température." Thesis, Toulouse, INPT, 2009. http://www.theses.fr/2009INPT030G/document.
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Dans le cadre du développement des Réacteurs à Haute Température (RHT), un des systèmes retenus pour la quatrième génération de centrale nucléaire, l’utilisation d’un cycle indirect est envisagée. Ce type d’installation, utilisant de l’hélium comme caloporteur, nécessite un échangeur intermédiaire de chaleur (Intermediate Heat eXchanger, IHX) le plus compact possible entre les circuits primaire et secondaire. Les contraintes imposées par la conception ainsi que les conditions sévères d’utilisation pour ce type d’installation (température maximale 850°C à 950°C, durée de vie 20000 h) ont orienté le choix des matériaux constitutifs de l’IHX vers deux alliages base nickel en solution solide : l’Inconel 617 et le Haynes 230. Le premier matériau a été largement étudié dans les années 1980 lors du projet allemand sur les RHT car possédant de bonnes propriétés mécaniques et en corrosion à haute température mais sa forte teneur en cobalt potentiellement activable est à considérer. Le Haynes 230, plus récent, possède des caractéristiques similaires à celles de l’alliage 617, le cobalt ayant été remplacé par du tungstène. L’objectif de cette thèse est d’étudier le comportement mécanique à haute température de ces deux alliages en relation avec les évolutions de leur microstructure. Les observations microstructurales à l’état de réception révèlent la présence de carbures primaires (M6C), la majorité étant répartie de manière homogène. Des carbures secondaires M23C6, peu nombreux, sont visibles à l’état de réception pour les deux matériaux. Les vieillissements thermiques imposés aux alliages à 850°C permettent une précipitation importante de carbures M23C6 sur les lignes de glissement et aux joints de grains, la taille de ces carbures augmentant et leur nombre réduisant avec la durée de traitement. A 950°C, l’évolution microstructurale conduit à une précipitation intragranulaire beaucoup plus limitée et à une évolution intergranulaire plus importante. Pour les deux matériaux, les observations de la microstructure et les résultats de dureté montrent que la majorité des évolutions microstructurales se produisent avant 1000 h aux deux températures étudiées. Les caractéristiques mécaniques de ces alliages ont été testées en traction, en fluage et en fatigue et fatigue relaxation. En particulier, les propriétés à 850°C et 950°C ont été étudiées pour différentes charges (en fluage), vitesses de déformation (en traction) et durées de relaxation (fatigue relaxation). Les effets d’un traitement initial ont également été étudiés, tels que l’effet d’un vieillissement thermique testé en fluage et traction et l’effet d’une prédéformation sur le fluage. Il ressort de cette étude que différents mécanismes de déformation sont mis en jeu successivement ou en parallèle au cours des essais réalisés. Ainsi, l’importance de la précipitation des carbures sur les propriétés mécaniques de l’Inconel 617 et du Haynes 230 a pu être démontrée, malgré leur statut d’alliages en solution solide. Par ailleurs, un même mécanisme thermiquement activé opère sur une très large gamme de vitesses de déformation, correspondant aux essais de traction, fluage et relaxation. Cette mise en relation entre microstructure et propriétés mécaniques permet de déterminer les avantages de chaque alliage ainsi que leurs limites d’utilisation dans le cadre de la fabrication d’un échangeur de chaleur de centrale nucléaireHigh Temperature Reactors (HTR), is one of the innovative nuclear reactor designed to be inherently safer than previous generation and to produce minimal waste. The most critical metallic component in that type of reactor is the Intermediate Heat eXchanger (IHX). The constraints imposed by the conception and the severe operational conditions (high temperature of 850°C to 950°C, lifetime of 20,000 h) have guided the IHX material selection toward two solid solution nickel base alloys, the Inconel 617 and the Haynes 230. Inconel 617 is the primary candidate alloy thanks to its good high temperature mechanical and corrosion properties and the large data base developed in previous programs. However, its high cobalt content has to be considered as an issue (nuclear activation). The more recent alloy Haynes 230, in which most of the cobalt has been replaced by tungsten, present characteristics similar to the 617 alloy. The objective of this thesis is to study the high temperature mechanical behaviour of both alloys in relation with their microstructural evolutions. The as received microstructural observations have revealed primary carbides (M6C). Most of this precipitates are evenly distributed in the materials. Few M23C6 secondary carbides are observed in both alloys in the as received state. Thermal ageing treatments at 850°C lead to an important M23C6 precipitation on slip lines and at grain boundaries. The size of this carbides increases and their number decreases with increasing ageing duration. The intragranular precipitation of secondary carbides at 950°C is more limited and the intergranular evolution more important than at 850°C. The microstructural observations and the hardness evolution of both alloys show that the main microstructural evolutions occur before 1,000 h at both studied temperatures. The mechanical properties of the Inconel 617 and the Haynes 230 have been studied using tensile, creep, fatigue and relaxation-fatigue tests. Particularly, the properties at 850°C and 950°C have been evaluated using several stress levels (creep), strain rates (tensile) and relaxation duration (fatigue). The effects of initial treatments have also been studied, i.e.ageing treatments effects on creep and tensile properties and cold-work effects on creep properties. At high temperature, the as received Inconel 617 does not show classical creep behaviour. This study shows the importance of the fast carbides precipitation on their mechanical properties, despite the fact that the Inconel 617 and the Haynes 230 are listed as solid solution alloys. Low cycle fatigue tests with and without holding time have been performed at 850°C under air and under vacuum on both alloys. The results showed that cyclic hardening, cyclic stability and life time are closely related to the duration of the holding time. Furthermore, a single thermally activated mechanism operates over a very wide range of strain rates, corresponding to tensile tests, creep and relaxation. The link between microstructure and mechanical behaviour presented in this thesis helps to determine the advantages as the operation limits of each alloy in order to manufacture a nuclear power plant heat exchanger
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Saliba, John Keith. "Hayes, Herr and Sack Esquire goes to Vietnam /." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011425.
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Thurlow, Aimee Rebecca. "Calibration studies of the Hayes Coastal Engineering Laboratory." Thesis, Texas A&M University, 2005. http://hdl.handle.net/1969.1/3098.
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The Hayes Coastal Engineering Laboratory is a new laboratory with two water basins: a 45.72-meters long, 3.66 meters wide and 3.06 meters deep Tow Tank with sediment pit for dredging and current flow studies, and a 36.58 meters long, 22.86 meters wide and 1.22 meters deep 3D Wave Basin for coastal wave studies. In order to assess the capabilities of the lab a series of tests were done in both tanks. Hydrodynamic tests in the Tow Tank using a Micro Acoustic Doppler Velociometer measured current flow in the tank and assessed the efficacy of different filters to stabilize flow patterns. A concrete dam structure installed near the reversed diffusers most effectively stabilized flow of all the configurations tested. Wave tests were conducted in the 3D Wave Basin with the newly-installed 48 paddle Rexroth wave generator at 0.5 and 1.0 meter water depths using wired and wireless capacitance wave gauges. These tests measured characteristics of the generated waves and reflection from the rubble-mound beach. In addition, initial testing of the Active Reflection Absorber (ARA) system was done. Correlating the wave data to the theoretical wave being produced showed that with water depth of 0.5 meters the 0.1 meter waves were well-formed, but the 0.2 meter waves showed energy loss and lower correlation. The results from one meter water depth wave tests showed good formation of 0.2 meter waves. In nearly all wave tests with pool buoys installed the waves were better formed with good correlation and a better fitting power spectrum. The beach reflection was within the expected value range, being ten percent and below for most tests. ARA, while operational, needs to be further tuned to find the settings that will increase its effectiveness.
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Santos, Eliane Carvalho dos, and 92992076273. "Transcriptoma de Copaifera multijuga Hayne: montagem e anotação." Universidade Federal do Amazonas, 2018. https://tede.ufam.edu.br/handle/tede/6728.
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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Copaifera multijuga Hayne is a large plant species, popularly known as copaiba, native to Latin America and Africa. They are widely used in Amazonian folk medicine, due to the properties of oleoresin extracted from the trunk of their trees, mainly used as: diuretic, laxative, anti-tetanic, anti-inflammatory, antitussive, healing and anti-tumor. Therefore, it is of great importance for research aimed at identifying in plants substances with potential medical and biotechnological purposes. Therefore, this work aimed to search for the transcriptome of C. multijuga Hayne, which was sequenced using the Roche 454 platform, obtaining a total of 638,576 reads, assembled using the de novo methodology using the MIRA and TRINITY platforms. Being generated, from the assembly by TRINITY 53.319 contigs and 62.839 by assembly MIRA. The transcriptome annotation was performed using BLASTx (NCBI) and the functional annotation through the Gene Ontology (GO) bank. The results were categorized according to GO, where the contigs were grouped in the categories: "Cell Component" with 6.249 contigs involved in this category, "Molecular Function" with a total of 17.208 contigs and "Biological Process" with 9,499 contigs. In the three categories the contigs evidenced are involved in the primary plant metabolism. A total of 184 unigenes were detected in 22 clusters, mainly involved in responses to plant oxidative stress, terpenes, important metabolites involved in the formation of copaiba oleoresin, diterpenes (resinous portion of oleoresin) and sesquiterpenes (volatile components of oil) and unigenes related to vegetal pigmentation such as: flavonoids, carotenoids and anthocyanins. In phylogenetic analysis, evolutionary comparisons of terpene synthase enzymes, copaiba oil formation components, with enzymes from the NCBI database were made. C. multijuga TPS4-2 unigene had similarity to other Copaifera TPS4-2 terpene sequences available from the bank. Thus, in this work the transcriptome of C. multijuga was carried out with new assembly and annotation, which leads to the perspective of studies with the unigenes encoding enzymes components of the oleoresin evidenced in this work, aiming with this future research for biotechnological purposes.
Copaifera multijuga Hayne é uma espécie de planta de grande porte, popularmente conhecida como copaíba, nativa da América Latina e da África. São amplamente utilizadas na medicina popular amazônica, devido as propriedades do óleo-resina extraído do tronco de suas árvores, utilizado principalmente como: diurético, laxativo, antitetânico, anti-inflamatório, antitussígeno, cicatrizante e anti-tumoral. Sendo, portanto, de grande importância para pesquisas que visem identificar nas plantas substâncias com potenciais finalidades médicas e biotecnológicas. Por isto, este trabalho visou pesquisar o transcriptoma de C. multijuga Hayne, o qual foi sequênciado utilizando a plataforma 454 Roche, sendo obtido um total de 638.576 reads, montados através da metodologia de novo com auxílio das plataformas MIRA e TRINITY. Sendo gerados, a partir da montagem por TRINITY 53.319 contigs e 62.839 pela montagem MIRA. A anotação do transcriptoma foi realizada utilizando BLASTx (NCBI) e a anotação funcional através do banco Gene Ontology (GO). Os resultados obtidos foram categorizados de acordo com GO, onde os unigenes foram agrupados nas categorias: “Componente Celular” com 6.249 contigs envolvidos nesta categoria, “Função Molecular” com total 17.208 contigs e “Processo Biológico” com 9.499 contigs. Nas três categorias os contigs evidenciados estão envolvidos no metabolismo primário vegetal. Já do metabolismo secundário foram detectados 184 unigenes, sendo organizados em 22 clusters, envolvidos principalmente em respostas ao estresse oxidativo vegetal, compostos terpenos, importantes metabólitos envolvidos na formação do óleo-resina de copaíba, diterpenos (porção resinosa do óleo-resina) e sesquiterpenos (componentes voláteis do óleo) e unigenes relacionados com a pigmentação vegetal tais como: flavonóides, carotenóides e antocianinas. Na análise filogenética foram feitas comparações evolutivas de enzimas de terpenos sintases, componentes de formação do óleo de copaíba, com enzimas do banco de dados NCBI. O unigene de TPS4-2 de C. multijuga mostrou-se mais próximo a outras sequências de terpenos TPS4-2 de Copaifera disponíveis no banco. Com isto, neste trabalho realizou-se o transcriptoma de C. multijuga com a montagem de novo e anotação o que leva a perspectiva de estudos com os unigenes codificadores de enzimas componentes do óleo-resina evidenciados neste trabalho, visando com isto futuras pesquisas para fins biotecnológicos.
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Hayes, Christina Savannah Maria. "Generic properties of the infinite population genetic algorithm." Diss., Montana State University, 2006. http://etd.lib.montana.edu/etd/2006/hayes/HayesC0806.pdf.
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Bereišaitė, Eglė. "Plikažiedžio linlapio (Thesium ebracteatum Hayne) biologija ir apsaugos problemos." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20140620_204339-59446.
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Dabar Lietuvoje yra žinomos dvi linlapio genties rūšys: plikažiedis linlapis (Thesium ebracteatum Hayne) ir melsvasis linlapis (Thesium linophyllon L.). Abi šios rūšys Lietuvoje saugomos (T. ebracteatum saugomas nuo 2003 metų, o T. linophyllon – nuo 2007 metų) ir priskiriamos pažeidžiamų rūšių kategorijai 2(V). Plikažiedis linlapis įtrauktas į Europos Sąjungos buveinių direktyvos II priedą. Linlapio (Thesium) genties populiaciniai tyrimai vygdyti 2003 ir 2006 m. birželio–liepos mėn. Tirtos 5 plikažiedžio linlapio cenopopuliacijos. Darbo tikslas buvo atlikti plikažiedžio linlapio (T. ebracteatum) populiacijų tyrimus ir nustatyti augalų būklės priklausomybę nuo buveinės sąlygų. Nustatyta, kad gausios ir geros būklės T. ebracteatum cenopopuliacijos auga atvirose, gerai apšviestose buveinėse. Čia augalai būna vešlesni ir gausiau žydi, o pievoms ir šlaitams užžėlus medžiais ir krūmais, susidarius pavėsiui augalai beveik nežydi, liaujasi daugintis sėklomis, išaugina tik vegetatyvinius ūglius. Labai neigiamai plikažiedžio linlapio cenopopuliacijas veikia susikaupiančios ir dirvožemio paviršių uždengiančios nuokritos (lapai, spygliai, sausos žolės, šakelės) ir stora samanų danga. Atlikti tyrimai parodė, kad didžiausias ir statistiškai patikimas koreliacinis ryšys T. ebracteatum sieja su Medicago falcata ir Knautia arvensis. Taigi šios rūšys gali būti laikomos potencialiais T. ebracteatum šeimininkais. Apsaugoti plikažiedžio linlapio populiacijas ir išlaikyti arba pagerinti jų būklę... [toliau žr. visą tekstą]The genus Thesium in Lithuania is represented by 2 species: Thesium ebracteatum Hayne and T. linophyllon L.. Both these species are included into the Red Data Book of Lithuania (T. ebracteatum under protection is since 2003 and T. linophyllon – is protected since 2007). Both Thesium species are ascribed to the group of vulnerable species. Furthermore, T. ebracteatum is included in to the Annex II of the EU Habitat Directive. Investigations on cenopopulations of T. ebracteatum were performed in 2003 and 2006 during June–July. Five cenopopulations were investigated. The aim of this study was to investigate populations of T. ebracteatum and to reveal dependence of population state upon habitat conditions. The study revealed that abundant and viable cenopopulations of T. ebracteatum usually occur in open, well-illuminated sites. Individuals of this species, as a rule, are well developed, with higher number of flowers. When meadows and slopes overgrow with shrubs and trees, because of law illumination T. ebracteatum flowers poorly, does not reproduce by seeds and occurs as vegetative shoots only. Accumulation of dead herb and leaf litter as well as dense and thick moss cover influence coenopopuliations of T. ebracteatum especially negatively. Results of this investigation revealed strong positive correlation between abundance of Medicago falcata and Knautia arvensis in the habitat. These species are, probably, important host plants for Thesium ebracteatum. In order to sustain or... [to full text]
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Kowalik, Adam Ch [Verfasser]. "Das Verhältnis von Staat und Wirtschaft bei Friedrich August von Hayek : Am Beispiel von Privatisierung und Deregulierung (Hayeks politische Kosmologie des 20. Jahrhunderts) / Adam Ch Kowalik." Aachen : Shaker, 2004. http://d-nb.info/1170531385/34.
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Haydys, Andriy. "Generalized Seiberg-Witten equations and hyperKähler geometry." [S.l.] : [s.n.], 2006. http://webdoc.sub.gwdg.de/diss/2006/haydys.
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Silva, Waldeyr Mendes Cordeiro da. "In silico reconstruction of sesquiterpenes metabolic network of Copaifera multijuga Hayne." reponame:Repositório Institucional da UnB, 2018. http://repositorio.unb.br/handle/10482/34208.
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Tese (doutorado)—Universidade de Brasília, Departamento de Biologia Celular, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Biologia Molecular, 2018.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) e Fundação de Apoio à Pesquisa do Distrito Federal (FAPDF).
Comumente chamada de “copaíba”, a Copaifera multijuga Hayne (CmH) é uma planta do gênero Copaifera (Leguminosae-Caesalpinoideae) que ocorre na Amazônia brasileira. Extraído do tronco das árvores, o óleo-resina de Copaifera spp. é amplamente utilizado por povos indígenas da região amazônica na medicina popular e tem alto potencial associado a aplicações biotecnológicas como agente antimicrobiano, anti-inflamatório, antitumoral, antinociceptivo, antileishmanial e cicatrizante. O óleo-resina de Copaifera spp. é composto por ácidos resinosos e compostos voláteis, principalmente sesquiterpenos e diterpenos Neste trabalho, sesquiterpenos do óleo-resina da CmH, cenários biológicos para sua biossíntese e seus mecanismos químicos foram coletados de vários estudos. Com base nessa coleta de dados, em dados de um transcritoma da CmH e em métodos e ferramentas computacionais, foi reconstruída in silico uma rede metabólica de sesquiterpenos de Copaifera multijuga Hayne (CmH). Esta rede metabólica é uma compilação de reações enzimáticas cobrindo mecanismos de ciclização, compostos preditos e cenários biológicos para a biossíntese. Os resultados foram convenientemente armazenados em um banco de dados em grafos projetado especificamente para esta finalidade, tornando-se localizáveis, acessíveis, interoperáveis e reutilizáveis. O workflow utilizado para a reconstrução in silico funciona para múltiplos organismos, bem como pode ser adaptado para diferentes tipos de mecanismos químicos alterando o conjunto de regras de gramática de grafos.
Ordinarily named “copaiba”, the Copaifera multijuga Hayne (CmH) is a plant of Copaifera genus (Leguminosae-Caesalpinoideae) occurring in the Brazilian Amazon. Exuded from the trunk of trees, the oil-resin of Copaifera spp. is widely used by indigenous people from the Amazon region for healing and in folk medicine, and it has high associated potential biotechnological applications, such as antimicrobial, anti-inflammatory, antitumor, antinociceptive, antileishmanial and healing. The oil-resin of Copaifera spp. is composed of resinous acids and volatile compounds, mainly sesquiterpenes and diterpenes In this study, a range of CmH oil-resin sesquiterpenes, biological scenarios for their biosynthesis, and its chemical mechanisms were collected from several studies. Based on this data collection, on CmH transcriptome data, and on computational methods and tools, an in silico sesquiterpene metabolic network of Copaifera multijuga Hayne (CmH) was reconstructed. The resulting sesquiterpene metabolic network of CmH is a compilation of reactions covering cyclization mechanisms, predicted compounds, and biological scenarios for the biosynthesis. These results were suitably stored in a graph database designed for it, and they became findable, accessible, interoperable, and reusable. The workflow for the in silico reconstruction can be used for multiple organisms as well as graph grammar rules can be added or removed to achieve different types of chemical mechanisms.
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Rosenblum, Lauren. "The Protesting Body: Suzanne Lacy, Leslie Labowitz-Starus, and Sharon Hayes." Master's thesis, Temple University Libraries, 2012. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/196443.
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Art HistoryM.A.
Suzanne Lacy, Leslie Labowitz-Starus and Sharon Hayes have created public performances that respond to the socio-political conditions of their time and place, and extend the boundaries of the traditional public sphere to include feminist concerns. In their collaborative performance In Mourning and In Rage (1977), Lacy and Labowitz-Starus utilized the private, feminist practice of consciousness-raising to bring widespread visibility to the politics of the female body. Hayes' works In the Near Future (2007-09) and Everything Else Has Failed! Don't You Think It's Time for Love? (2007), draw attention to issues concerning counterpublics through obliquely referential personal and political narratives. These works all mobilize a performing, protesting body whose corporeality mediates the audience's political realizations, past memories and current subjecthood.
Temple University--Theses
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Mastic, Timothy. "Normative Wit: Haydn's Personal Sonata Form." Thesis, University of Oregon, 2015. http://hdl.handle.net/1794/19231.
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This thesis approaches Haydn’s sonata-form procedures from the perspective of the eighteenth-century listener, asking, if a moment is allegedly “witty” according to modern analysts, would Haydn's contemporary audience have heard it as such? Eighteenth-century wit has two sides: wit involves an aspect of surprise or deception, a breaking of understood norms; however, wit must also involve an unsuspected congruity, a broader connection created only by breaking the aforementioned norm. Taking this as my starting point, I explore false recapitulations in the Haydn’s music, concluding that this device cannot be considered witty because it did not break an understood convention. I then provide detailed analyses of the first movements of Haydn’s “Military” Symphony no. 100 and String Quartet in D major, op. 33 no. 6, arguing that they are witty not solely because they are disruptive, but because this disruption binds the sonata together in an unexpected way.
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Posner, Richard A. "Hayek, ley y cognición." Foro Jurídico, 2017. http://repositorio.pucp.edu.pe/index/handle/123456789/119491.
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Olng'otie, Patrick Arap Seurei. "Acacia tortilis (Forsk.) Hayne : a study of genetic structure and breeding systems." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306031.
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