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Dissertations / Theses on the topic 'Manganese steel. Steel castings'

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Published: 4 June 2021

Last updated: 11 February 2022

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1

Whateley, Philip N. "Defects in steel investment castings." Thesis, Aston University, 1991. http://publications.aston.ac.uk/11879/.

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A general investigation was performed, in an industrial environment, of the major types of defect specific to investment castings in steel. As a result of this work three types of metallurgical defect were selected for further study. In the first of these, defects in austenitic stainless steel castings were found to result from deoxidation by-products. As a result of metallographic investigation and the statistical analysis of experimental data, evidence was found to support the hypothesis that the other two classes of defects - in martensite stainless and low alloy steels -both resulted from

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2

Walker, Justin Daniel. "An innovative new pouring design for steel castings." [Ames, Iowa : Iowa State University], 2008.

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3

Gorsky, Daniel A. "Niyama Based Taper Optimizations in Steel Alloy Castings." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1316191746.

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4

Haakonsen, Fredrik. "Optimizing of Strømhard austenitic manganese steel." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for materialteknologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-5605.

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In the present doctoral thesis the focus has been on two different ways to achieve improvement of the mechanical properties of an austenitic manganese steel. One of them was to introduce substrate particles and see if this could nucleate grains during solidification, giving grain refinement. The other one was to add a strong carbide forming element to the alloy, and affect the mechanical properties by precipitating carbides in the microstructure. The base for the experiments was the steel Strømhard. Strømhard is a former patented steel produced by Scana Steel Stavanger AS. It is a modification

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5

Galles, Daniel Joseph. "Prediction of distortions and pattern allowances in steel sand castings." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/2077.

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Modeling the thermomechanical behavior of the bonded sands used for steel sand casting is of great importance for the prediction of distortions and pattern allowances. In this study, distortions created by mechanical interactions between the casting and sand mold are measured from two experimental setups and then predicted by finite element stress analyses. The casting geometries involve a hollow cylinder for the first experiment and U-shaped bracket for the second. The temporal evolutions of 1) the cylinder’s inner diamet

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6

Sumer, Ali. "Prototype Development and Experimental Verification of a Cast Modular Connector for Seismic-Resistant Steel Frames." Diss., The University of Arizona, 2006. http://hdl.handle.net/10150/194890.

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A cast modular connector (MC) has been developed for use in seismic-resistant steel moment frames. The MC is a field bolted beam flange connection intended to serve as the frame's special energy-dissipating detail. The connector is specifically configured for optimal seismic performance through a casting process. The MC possesses inherent ductility through variable-section arms that minimize plastic strain demand and a reliable yet economical fastening method through a base end-region that virtually eliminates prying forces on bolts.The dissertation presents three journal papers. The first pap

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7

O'Brien, Timothy John. "Ductile fracture mechanisms in carbon manganese steel weld metals." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47209.

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8

Mei, Nanxuan. "Characterization of Stainless Steel Welding Fume Particles : Influence of Stainless Steel Grade, Welding Parameters and Particle Size." Thesis, KTH, Materialvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-189203.

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Welding is a widely used method to join two pieces of stainless steel. Since it produces a large amount of fume during the process, it can cause adverse health effects. The welding fume particles contain many elements. Among them Cr, Mn and Ni are of concern. These three elements can cause diseases if inhaled by humans, especially Cr(VI). In this project, welding fume particles are collected during welding of different stainless steel grades (austenitic AISI 304L and duplex LDX2101). Furthermore, different welding types (manual metal arc welding and metal active gas welding), shielding gas (MI

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9

Federico, Giovanni. "Use of Cast Modular Components for Concentrically Braced Steel Frames." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/268572.

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Cast modular components have been under development for earthquake resistant steel structures. These concepts take advantage of the versatility in geometry afforded with the casting process to create components specifically configured for ductile behavior. Two systems were developed as part of this dissertation research: (1) the Cast Modular Ductile Bracing system (CMDB); (2) the Floating Brace system (FB).The CMDB system makes use of cast components introduced at the ends and the center of the brace to produce a special bracing detail with reliable strength, stiffness and deformation capacity

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10

Knox, E. "Improved property control of hot rolled carbon manganese steel grades." Thesis, Swansea University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637816.

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The work is in the form of a project aimed at furthering the understanding of metallurgical interactions during the processing of hot rolled CMn (-Si) steel grades. The aim has been achieved through a number of complimentary investigations. Through-coil mechanical testing and metallographic examination, coupled with detailed analyses of relevant process parameters, have highlighted the typical properties and property variations within Corus' CMn (-Si) products. Deformation dilatometry experiments have allowed the transformation behaviour of CMn (-Si) compositions to be assessed and compared wi

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11

Siafakas, Dimitrios. "On deoxidation practice and grain size of austenitic manganese steel." Licentiate thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH. Forskningsmiljö Material och tillverkning – Gjutning, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-37788.

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The exceptional wear resistance and work hardenability, place Hadfield steel as one of themost important materials for manufacturing cast components used in the mining, crashing,drilling, and excavation industries. In all metallic alloys used for component casting, themechanical properties are highly influenced by the microstructure of the material. Castcomponents with finer microstructural characteristics are known to present bettermechanical properties and reduced risk of defects when compared with components witha coarser microstructure. A reduced grain size in Hadfield steel can increase t

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12

Mills, Duncan John. "The tribological behaviour of a high nitrogen manganese austenitic stainless steel." Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/26222.

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The tribological behaviour of two experimental alloys, namely a high nitrogen manganese austenitic stainless steel and a vanadium micro-alloyed stainless steel is compared to the tribological behaviour of standard stainless steels AISI 304 and AISI 316 and to the wear resistant steel, Hadfields manganese steel. The wear tests performed on these steels were abrasion, abrasion-corrosion and cavitation erosion. The high nitrogen alloy contained 0.63wt% nitrogen and 0.83wt% nickel and was found to have mechanical properties superior to the other steels studied in this thesis. This alloy was

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13

Inegbenebor, A. O. "Structure-property relationships in some iron-manganese-molybdenum steels." Thesis, Bucks New University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380862.

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14

Ahlin, Heikkinen Daniel, and Jacob Holmberg-Kasa. "Direkt släckning efter uppslag." Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20416.

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Målet med denna undersökning är att minska energiförbrukningen vid framställning av gjutna detaljer i austenitiskt manganstål. Detta görs genom att undersöka om det är materialmässigt möjligt att göra förändringar som förkortar framställningsprocessen av de gjutna detaljerna medan snarlika materialegenskaper bibehålls. Den processförändring som undersöks är att slopa upplösningsbehandlingen under framställningsprocessen genom att istället släcka den gjutna detaljen direkt efter uppslag från gjutform. Konkret innebär detta att detaljen slås upp och släcks vid ett tidigare och tidsbestämt skede.

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15

Sutton, Benjamin James. "Solidification Behavior and Hot Cracking Susceptibility of High Manganese Steel Weld Metals." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366302517.

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16

Mosecker, Linda Verfasser], Wolfgang [Akademischer Betreuer] [Bleck, and Joachim [Akademischer Betreuer] Mayer. "Materials design of high nitrogen manganese austenitic stainless TWIP steels for strip casting / Linda Mosecker ; Wolfgang Bleck, Joachim Mayer." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1126040770/34.

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Mosecker, Linda [Verfasser], Wolfgang [Akademischer Betreuer] Bleck, and Joachim [Akademischer Betreuer] Mayer. "Materials design of high nitrogen manganese austenitic stainless TWIP steels for strip casting / Linda Mosecker ; Wolfgang Bleck, Joachim Mayer." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1126040770/34.

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18

Naganathan, A. "Hot Stamping of Manganese Boron Steel(Technology Review and Preliminary Finite Element Simulations)." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1291069172.

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19

Beal, Coline. "Mechanical behaviour of a new automotive high manganese TWIP steel in the presence of liquid zinc." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00679521.

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High manganese TWIP (TWinning Induced Plasticity) steels are particularly attractive for automotive applications because of their exceptional properties of strength combined with an excellent ductility. However, as austenitic steels, they appear to be sensitive to liquid zinc embrittlement during welding, the liquid zinc arising from the melted coating due to the high temperatures reached during the welding process. In this framework, the cracking behaviour of a high manganese austenitic steel has been investigated in relation to the liquid metal embrittlement (LME) phenomenon by hot tensile t

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20

Birnbaum, Peter, Verena Kräusel, and Dirk Landgrebe. "Forming Behavior of Manganese-Boron Steel 22MnB5 while Cooling according to its Microstructural Development." Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-170323.

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The press hardening belongs to state-of-the-art technology at sheet metal forming to gain high strength and crash resistant parts in automotive industry. This process could establish due to its cost- and esourceefficiency. According to ongoing developments on direct press hardening processes it is necessary to describe and understand the thermo-mechanical treatment of 22MnB5. Therefore the flow behavior and phase transformation during cooling with simultaneous forming is investigated. The experimental process considers industrial parameters in order to get industry-oriented results. In deep d

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21

Hunt, Christopher Paul. "Influence of residual elements on the intergranular stress corrosion cracking of carbon manganese steel." Thesis, University of Surrey, 1987. http://epubs.surrey.ac.uk/847543/.

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The Influences of five common tramp elements P, S, Sn, Cu, and Ni at typical residual levels on the intergranular stress corrosion cracking (IGSCC) of a typical mild steel. (0.15%C, 0.8%Mn and 0.05%Si), are studied in nitrate solutions and a mixture of carbonate and bicarbonate solutions. The relative effects of these impurities are examined in terms, of the electrochemical properties of unstressed material, of the IGSCC susceptibility in a constant strain rate test, and of the grain boundary and surface oxide compositions via surface analysis. Results show that in general only phosphorus can

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22

Collins, Sunniva Refsnes. "Forging effects on manganese sulfide inclusions as fatigue initiation sites in AISI 4140 steel." Case Western Reserve University School of Graduate Studies / OhioLINK, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=case1057696631.

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23

Debray, Bruno. "Microstructure and mechanical properties of an as-hot rolled carbon manganese ferrite-bainite sheet steel." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69713.

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By means of torsion testing, the microstructures and mechanical properties produced in a 0.14%C-1.18%Mn steel were investigated over a wide range of hot rolling conditions, cooling rates and coiling temperatures. The reheating temperature was varied between 800$ sp circ$C and 1050$ sp circ$C, and strains between 0 and 0.8 were applied. This led to austenite grain sizes ranging from 10 to 150$ mu$m. Two cooling rates, 55$ sp circ$C/s and 90$ sp circ$C/s, were applied and cooling was interrupted at coiling temperatures ranging from 550$ sp circ$C to 300$ sp circ$C.<br>Optical microscopy and TEM

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24

Macchione, Alfred. "Static recrystallization and precipitation in titanium-microalloyed steels containing different levels of manganese." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66060.

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25

Bobynko, Joanna. "Characterisation and absolute quantification of nanosized V and Nb precipitates in high manganese steel using DualEELS." Thesis, University of Glasgow, 2018. http://theses.gla.ac.uk/30670/.

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The dispersion strengthening is a process that strengthens the material's matrix with use of the smallest precipitates. The most power comes from the character of the nanostructures, their chemical compositions, crystallographic structures, sizes, shapes and interfaces between matrix and precipitates. Through analytical methods it is possible to study and achieve the optimal mechanical properties of elements produced from high-manganese steels with dispersive nanoparticles such as carbides or carbo-nitrides. So far the most effective research methods are transmission electron microscopy and sp

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26

Béal, Coline. "Mechanical behaviour of a new automotive high manganese TWIP steel in the presence of liquid zinc." Thesis, Lyon, INSA, 2011. http://www.theses.fr/2011ISAL0029/document.

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Les aciers TWIP (TWinning Induced Plasticity) à haute teneur en manganèse sont particulièrement prometteurs pour les applications automobiles de par leur excellent compromis entre résistance mécanique et ductilité. Cependant, la microstructure austénitique leur confère une sensibilité à la fragilisation par le zinc liquide durant les procédés de soudage ; le zinc liquide provenant de la fusion du revêtement résultant de l’élévation de température à la surface de l’acier. Dans cette étude, la fissuration d’un acier austénitique à haute teneur en manganèse a été étudiée en rapport avec le phénom

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27

Grandillo, Angelo M. "A temperature control strategy for Stelco McMaster Works /." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61258.

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In this study, it was shown that improvements in the quality of continuously cast steel billets, similar to those which can be achieved by electromagnetic stirring (EMS) of the liquid pool during solidification, can be obtained if casting superheats can be consistently controlled at low levels. A lack of casting temperature control is not only detrimental to the quality of the cast product, but also to a shop's overall productivity. The important variables for temperature control in the ladle, tundish and mould were quantified and possible methods of controlling these variables were proposed.<

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28

Čech, Jan. "Studium slévárenských vad v masivních odlitcích." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-234184.

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A massive castings defects are examined in this doctoral thesis, specialise in steels passing through peritectic transformation. There are typical types of defects at massive steel castings, as contrasted to „ordinary“ internal and surface ones. For massive steel castings are typical defects under feeders like conchoidal fractures, segregations, microporesities, reoxidation products. Combination of Al and Zr is an ordinary final deoxidation of EOP and LF steel for castings in ŽĎAS a.s. foundry. The aim of Al + Zr combination was to both deep deoxidation by Al (decrease of bubbles risk) and den

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29

Bannister, S. R. "The effect of inclusions and matrix hardenability upon the microstructural development of carbon manganese steel weld metals." Thesis, University of Southampton, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378675.

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30

Thorning, Casper. "Grain Boundary Ridge Formation during High Temperature Oxiditation of Manganese Containing Steels." Doctoral thesis, KTH, Materialvetenskap, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4778.

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31

Cerra, Florez Mauro Andrés. "Estudo comparativo da resistência à corrosão entre aços alto manganês e o aço 9% níquel em soluções aquosas de H2SO4 e NaCl." reponame:Repositório Institucional da UFC, 2017. http://www.repositorio.ufc.br/handle/riufc/25624.

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CERRA FLOREZ, M. A. Estudo comparativo da resistência à corrosão entre aços alto manganês e o aço 9% níquel em soluções aquosas de H2SO4 e NaCl. 2017. 108 f. Dissertação (Mestrado em Ciência de Materiais)–Centro de Tecnologia, Universidade Federal do Ceará, Fortaleza, 2017.<br>Submitted by Marlene Sousa (mmarlene@ufc.br) on 2017-09-13T13:08:35Z No. of bitstreams: 1 2017_dis_macerraflorez.pdf: 7059370 bytes, checksum: 037d39ae844a1b60cbe1183a10902438 (MD5)<br>Approved for entry into archive by Marlene Sousa (mmarlene@ufc.br) on 2017-09-13T13:09:44Z (GMT) No. of bitstreams: 1 2017_dis_macerraflo

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Cortez, Juliana 1984. "Construção e avaliação de um instrumento para espectroscopia de emissão em plasma induzido por laser (LIBS) : aplicação em ligas metalicas." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249949.

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Orientador: Celio Pasquini<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica<br>Made available in DSpace on 2018-08-08T16:03:21Z (GMT). No. of bitstreams: 1 Cortez_Juliana_M.pdf: 4343113 bytes, checksum: d1746c525a8d51ede4e8432a525eecf2 (MD5) Previous issue date: 2007<br>Resumo: Neste trabalho um instrumento LIBS com resolução temporal (TRELIBS) foi construído e seu desempenho foi avaliado para análise qualitativa e quantitativa. Além disso, este trabalho apresenta estudos exploratórios acerca da influência de parâmetros que afetam as análises em LIBS. O ins

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33

Klváček, Jan. "Vliv metalurgického zpracování a podmínek odlévání na vnitřní jakost ocelových odlitků." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230533.

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The aim of this thesis was to perform the classification of defects of emerging in a specific type of steel castings made by company UNEX Foundry, Ltd. and then determine the conditions of their origin. This is mainly discontinuity of casting material. The next step was to propose the corrective measures eliminating creation of these defects.

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34

Hariramabadran, Anantha Krishnan. "Study of Total Oxygen Content and Oxide composition Formed During Water Atomization of Steel Powders due to Manganese Variation." Thesis, KTH, Materialvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101665.

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Powder metallurgy (PM) is a technology used to manufacture near net shape components for an increasing number of applications like automobile components, aircraft components, cutting tools, refractory, household appliances, etc. The general PM process comprises of Powder manufacturing/powder tailoring, Compacting, and Sintering. Based on product’s final requirements, optional secondary operations are performed. PM components for automotive application are experiencing a growth coupled with new challenges. PM´s capability for producing complex net shaped components with desired properties has

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35

Bai, Yu. "Effect of Grain Size on the Hydrogen Embrittlement Behaviors in High-manganese Austenitic Steels." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/202713.

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36

Návrat, Radim. "Vliv metalurgického zpracování a slévárenské technologie na jakost ocelových odlitků." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230530.

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The aim of this thesis was to determine the impact of the used chemical composure during metallurgical treatment and foundry technology on the inner and surface quality of experimental casting under operational conditions at Třinec foundry. A minor part of this thesis is focused on the determination of the effect of filtration on mechanical properties of steel.

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Li, Peigang. "Cold lap formation in Gas Metal Arc Welding of steel : An experimental study of micro-lack of fusion defects." Doctoral thesis, Högskolan Väst, Avd för maskinteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-5596.

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Cold laps are defined as micro-lack of fusion defects at the weld toe more or less parallel to the surface of the parent plate. These defects are known to negatively influence the fatigue properties of weldments. Previous studies suggest that cold lap formation can not be avoided completely in Gas Metal Arc Welding (GMAW). Therefore, a better understanding of formation mechanisms is imperative to be able to minimize the number and size of these defects. The main objective of this work has been to provide a more comprehensive understanding of cold laps, including categorising, characterisation

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38

Alyaz, Serhat. "Effects Of Heat Treatment And Chemical Composition On Microstructure And Mechanical Properties Of Hadfield Steels." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/2/776526/index.pdf.

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The aim of this thesis is to investigate the effects of Mn content and alloying additions such as Cr and Mo, and various heat treatment procedures on both microstructure and mechanical properties of austenitic manganese (Hadfield) steels. For this purpose, steels with two different Mn content were considered (12-14 Mn, 16-18 Mn). First, five different heat treatment procedures were applied to the as-cast 12-14 Mn specimens to decide the procedure resulting the optimum tensile properties. Then, the specimens having various amounts of Mn, Cr and Mo were cast and heat-treated to investigate the e

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39

Thyssen, Christian [Verfasser], and Wolfgang [Akademischer Betreuer] Sand. "Biofilm formation by the manganese-oxidizing bacterium Leptothrix discophora strain SS-1 and corrosion of stainless steel / Christian Thyssen ; Betreuer: Wolfgang Sand." Duisburg, 2018. http://d-nb.info/1164376381/34.

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40

Berger, Jason E. "Effect of Preferential Vaporization during Laser Rewelding on the Solidification and Cracking Response of Type 304L Stainless Steel Alloys with Systematically Varied Manganese Contents." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523533179094721.

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41

Poole, Warren J., Matthias Militzer, J. Huang, S. C. Vogel, and C. Jacques. "The study of low-temperature austenite decomposition in a Fe–C–Mn–Si steel using the neutron Bragg edge transmission technique." Elsevier, 2007. http://hdl.handle.net/2429/397.

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A new technique based on the study of the transmitted neutron beam has been developed to study the low-temperature decomposition of austenite in a 0.4 wt.% C–3 wt.% Mn–2 wt.% Si steel. Experiments were conducted in which the neutron beam continuously passed through a specially designed layered sample, the temperature of which could be controlled to allow for a high-temperature austenization treatment followed by accelerated cooling to an isothermal transformation temperature in the range of 275–450 °C. It was possible to measure the volume fraction of the face-centred cubic (fcc) and body-cent

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42

Westin, Elin M. "Microstructure and properties of welds in the lean duplex stainless steel LDX 2101." Doctoral thesis, KTH, Metallografi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-27387.

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Duplex stainless steels can be very attractive alternatives to austenitic grades due to their almost double strength at equal pitting corrosion resistance. When welding, the duplex alloys normally require addition of filler metal, while the commodity austenitic grades can often be welded autogenously. Over-alloyed consumables are used to counteract segregation of important alloying elements and to balance the two phases, ferrite and austenite, in the duplex weld metal. This work focuses on the weldability of the recently-developed lean duplex stainless steel LDX 2101® (EN 1.4162, UNS S32101).

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Malý, Václav. "Optimalizace výroby těžkých ocelových odlitků." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229770.

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In its first part the work deals with the frequent defects of heavy steel castings. Experiments were carried out in very heavy bearing rings casting of cement kilns in order to reduce consumption of liquid metal and to increase the internal quality of castings. The progress was achieved by introducing new technologies; this thesis describes the technologies used and subsequently performs their comparison.

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Westin, Elin M. "Welds in the lean duplex stainless steel LDX 2101 : effect of microstructure and weld oxide on corrosion properties." Licentiate thesis, KTH, Materials Science and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9299.

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<p>Duplex stainless steels are a very attractive alternative to austenitic grades due to their higher strength and good corrosion performance. The austenitic grades can often be welded autogenously, while the duplex grades normally require addition of filler metal. This is to counteract segregation of important alloying elements and to give sufficient austenite formation to prevent precipitation of chromium nitrides that could have a negative effect on impact toughness and pitting resistance. The corrosion performance of the recently-developed lean duplex stainless steel LDX 2101 is higher tha

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45

Westin, Elin M. "Welds in the lean duplex stainless steel LDX 2101 : effect of microstructure and weld oxides on corrosion properties." Licentiate thesis, Stockholm : Industriell teknik och management, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9299.

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46

Cunha, Emerson Fernandes da. "Caracterização da resistência à deformação a quente do aço baixo carbono microligado ao vanádio." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/23923.

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Este trabalho, realizado em cooperação com a Gerdau Riograndense, tem por finalidade avaliar o comportamento do aço GG1013-M, um aço baixo teor de carbono microligado com vanádio e manganês, na laminação a quente no que tange a sua resistência à deformação, possibilitando assim a tomada de decisão em relação a modificações no processo. Foram realizados testes em simulador termomecânico Gleeble™ para determinação das temperaturas a serem usadas no teste prático no laminador, onde testou-se lotes que cobrissem toda a amplitude da faixa de composição química da qualidade do aço em estudo. No test

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47

Pernica, Vítězslav. "Optimalizace výroby těžkých ocelových odlitků." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228645.

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Diploma thesis deal with definnig the casuses of stell castings defects in the DSB EURO s.r.o Foundry. The main target is to optimise technological parameters for avoiding the surface casting defects. The first stage is the identification of the defects, describing of the main reasons and mechanic. Defect quantification is make from measuring of area and volume of the mended defects. In association with surface defects, the number of the crackings was observed. Finally there are suggested correction actions based on the previous investigation.

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48

Kaněra, Miloš. "Výroba odlitků z austeniticko-feritických hyperduplexních korozivzdorných ocelích." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-445174.

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The thesis deals with hyper duplex stainless austenitic-ferritic steels and their mechanical and castability properties. The evaluation of resistance to pitting corrosion is divided by PRE values. Steels with a PRE value higher than 48 belong to the group of hyper duplex steels. The theoretical part contains an introduction to the chemical composition, structure and properties of these steels. The practical part is focused on the conditions of tendency to crack castings during solidification and cooling. Furthermore, there is evaluated influence of intermetallic phases on mechanical properties

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49

Krejčí, Martin. "Nedestruktivní zkoušení odlitků ozubených kol." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228720.

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This diploma thesis resolves aplication of particular non-destructive testing methods while producing castings of steel wheels and quality control of this process. There are described fundamentals of flaw detection, determination of flaw-generation cause and suggestions for optimalization of casting process and increasing of its quality.

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50

Pu, Xiaoxue. "Thermomechanical study of the gigacycle fatigue behavior of pure iron and carbon-manganese steels : influence of chemical composition and microstructure on damage and crack initiation mechanism." Thesis, Paris 10, 2019. http://www.theses.fr/2019PA100051.

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Ce travail tente de mieux comprendre les dommages par fatigue dans les aciers à ferrite-perlite dans la fatigue à très grand nombre de cycles (VHCF). Les influences de deux paramètres, le pourcentage de phase perlite et le pourcentage d'atomes interstitiels libres dans une solution solide, sont étudiées pour comprendre les mécanismes de dissipation en fatigue à 20 kHz. Une thermographie infrarouge in situ est réalisée pour enregistrer les changements de température, tandis que des observations au microscope sont menées pour étudier le mécanisme de dissipation. Pour les matériaux de BCC, sous f

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