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Dissertations / Theses on the topic 'Elevated temperature'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Cigas, Saulius. "Standaus apkrovimo ciklinių deformavimo parametrų nustatymas korozijai ir karščiui atsparaus plieno suvirintųjų sujungimų medžiagoms." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050613_152519-67955.

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Cigas S. Determination of low cycle straining parameters for weld metals of stainless steel: Master thesis of mechanical engineer / research advisor associate professor dr. R. Šniuolis; Šiauliai University, Technological Faculty, Mechanical Engineering Department.–Šiauliai, 2005.-68p. Strain and stress change during the exploitation depend on the type of material (hardening, softening or cyclically stabile), that is chosen for the constructions in low cycle loading. If we know the type of the material, we can determine the possibility of its application in concrete exploitation conditions. Rea

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2

Karademir, Tanay. "Elevated temperature effects on interface shear behavior." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42764.

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Environmental conditions such as temperature inevitably impact the long term performance, strength and deformation characteristics of most materials in infrastructure applications. The mechanical and durability properties of geosynthetic materials are strongly temperature dependent. The interfaces between geotextiles and geomembranes as well as between granular materials such as sands and geomembranes in landfill applications are subject to temperature changes due to seasonal temperature variations as well as exothermic reactions occurring in the waste body. This can be a critical factor gover

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3

borgonovo, cecilia. "Aluminum Nano-composites for Elevated Temperature Applications." Digital WPI, 2010. https://digitalcommons.wpi.edu/etd-theses/962.

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"Conventional manufacturing methods are sub-optimal for nano-composites fabrication. Inhomogeneous dispersion of the secondary phase and scalability issues are the main issues. This work focuses on an innovative method where the reinforcement is formed in-situ in the melt. It involves the reaction of the molten aluminum with a nitrogen- bearing gas injected through the melt at around 1273 K. AlN particles are expected to form through this in situ reaction. A model has been developed to predict the amount of reinforced phase. Experiments have been carried out to confirm the feasibility of the p

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4

Lind, Jonna. "Tribology of polymer composites for elevated temperature applications." Licentiate thesis, Uppsala universitet, Tillämpad materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-332985.

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Polymers as construction material are common in the industry. Although more recently the use of polymer composites in more demanding applications has increased, requiring more of them mechanically, tribologically and thermally. To enhance the properties various fillers are used, from common glass fibers to more advanced nanoparticles. For this study three types of base polymers have been studied: poly-amide (PA), poly-phenylene-sulphide (PPS) and poly-ether-ether-ketone (PEEK). They have been filled with glass fibers, carbon fibers, poly-tetra-fluoro-ethylene (PTFE), graphite and thermally con

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5

Yang, Kwan-Ho. "Development of impact testing procedure at elevated temperature /." Thesis, Connect to this title online; UW restricted, 1988. http://hdl.handle.net/1773/7038.

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6

Cretegny, Laurent. "Fracture toughness behavior of weldments at elevated temperature." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/19957.

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7

Przydatek, Jan. "The elevated temperature deformation of aluminium alloy 2650." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287577.

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8

Tsembelis, Kostantinos. "Elevated temperature measurements during a hypervelocity impact process." Thesis, University of Kent, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285978.

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9

Zhu, Cuiru. "Elevated temperature liquid chromatography and peak shape analysis." Thesis, University of York, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.413172.

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10

Renshaw, Matthew Peter. "Magnetic resonance studies at elevated temperature and pressure." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709303.

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11

Braun, Eric. "Elevated temperature stability of gallium arsenide integrated circuits." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/38045.

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12

Poole, Eric L. "Durability of polymeric composites after elevated temperature aging /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/9963.

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13

Chiu, Sing-Lok. "Behaviour of normally consolidated clay at elevated temperature." Thesis, The University of Sydney, 1996. http://hdl.handle.net/2123/18126.

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Not much has research work been done so far on temperature-related behaviour of clays. This theme has not received much attention of research workers in this field for a long time until the late 1960s when Campanella and Mitchell published their paper on "Influence of Temperature Variations on Soil Behaviour" in 1968 (Campanella and Mitchell, 1968). What followed was a special conference on this subject held in Washington in 1969, addressing a variety of research results in this field at that time. However, the interest of most research workers in the following two decades has been in soil mod

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14

Schoech, Alexander. "Quality control of freeform parts at elevated temperature." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3424502.

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Modern industries operate under high cost pressure coupled with ever increasing demands on their processes and products. Production processes are e.g. increasingly complex while the permitted tolerances, batch sizes and time-to-market times decrease. These partly contradictory trends require sophisticated production processes with advanced strategies for quality assurance and process control. The aim of this work is to analyse such a complex, multi-stage production process, the production of turbine blades, in terms of quality, process adjustment for small batch sizes and cost. In the conside

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15

Xu, Lei. "Magnetization Dynamics at Elevated Temperatures." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/311342.

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The area of ultrafast (sub-nanosecond) magnetization dynamics of ferromagnetic elements and thin films, usually driven by a strong femtosecond laser pulse, has experienced intense research interest. In this dissertation, laser-induced demagnetization is theoretically studied by taking into account interactions among electrons, spins, and lattice. We propose a microscopic approach under the three temperature framework and derive the equations that govern the demagnetization at arbitrary temperatures.To address the question of magnetization reversal at high temperatures, the conventional Landau-

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16

Isom, Stephen Clay. "The effects of elevated temperature on preimplantation-stage porcine embryos." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4385.

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Thesis (Ph.D.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (February 27, 2007) Vita. Includes bibliographical references.

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17

Dike, Shweta Srikant. "Dynamic Deformation of Materials at Elevated Temperatures." Cleveland, Ohio : Case Western Reserve University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1268337193.

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Thesis (Master of Sciences (Engineering))--Case Western Reserve University, 2010<br>Department of EMC - Mechanical Engineering Title from PDF (viewed on 2010-05-25) Includes abstract Includes bibliographical references and appendices Available online via the OhioLINK ETD Center

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18

Zhang, Zhan. "Development of magnesium-based alloys for elevated temperature applications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0026/NQ52270.pdf.

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19

Counts, William Arthur. "Mechanical behavior of bolted composite joints at elevated temperature." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/17315.

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20

Ratkovich, John. "Processing and elevated temperature ductility of Aluminum alloy 7475." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27223.

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21

Harlow, K. S. "The elevated temperature mechanical behaviour of aluminium-lithium alloys." Thesis, University of Nottingham, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374661.

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22

Sweeney, Deborah May-Katherine. "ELEVATED TEMPERATURE OXIDATION OF BORON MODIFIED Ti-6Al-4V." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1208285133.

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23

Chen, Yong-Ching. "Elevated temperature deformation and forming of aluminum-matrix composites /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487758178238026.

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24

Shah, Vishal Sanjay. "Detection of microcracks in concrete cured at elevated temperature." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0008824.

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25

Legrand, Pierre. "Structural assement and design of concrete structures under fire conditions." Thesis, KTH, Betongbyggnad, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187886.

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Behaviour under fire circumstances is becoming more and more crucial for designing a concrete structureand authorities require more often a fire-resistance time. In fact, engineers need a powerful, user-friendly,accurate and non time-consuming method that can be used to design reinforced concrete structures. Inthis study, the author has developed a method to design any fire-exposed reinforced concrete crosssections under flexure that takes into account second order effect. The first part focuses on the thermal analysis of the reinforced concrete cross section. Fourier'sequation is solved using

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26

Huang, Ming Jun. "The application of computational fluid dynamics (CFD) to predict the thermal performance of phase change materials for the control of photovoltaic cell temperatures in buildings." Thesis, Ulster University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248684.

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27

Gunda, Rahul. "Performance analysis of high power photoconductive switch at elevated temperature." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4310.

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Thesis (M.S.)--University of Missouri-Columbia, 2005.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (July 13, 2006) Includes bibliographical references.

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28

Leggett, Jonathan. "Elevated temperature oxidation and corrosion of a titanium aluminide alloy." Thesis, Cranfield University, 1997. http://dspace.lib.cranfield.ac.uk/handle/1826/3584.

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Titanium aluminides are being developed to expand the temperature capability of titanium alloys with maximum service temperatures around 700°C. These materials also have the ability to replace nickel superalloys with potential applications in the high pressure compressor, and in the 4th stages of the low pressure turbine. The above applications place these alloys in environments not previously considered. Within the compressor hot salt corrosion may be a problem with salt ingested from the atmospheric aerosol. While in the turbine the combination of salt ingestion, and SO, from the burning of

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29

Malm, Chistorpher. "The Flexural Response of Bolted Composite Panels at Elevated Temperature." Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/MalmCG2001.pdf.

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30

Yatomi, Masataka. "Factors affecting the failure of cracked components at elevated temperature." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405783.

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31

Barrow, A. T. W. "Strong, tough and fatigue-resistant steel for elevated temperature applications." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596428.

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The work described in this thesis details the design and characteristics of low-Ni maraging steels suitable for use at elevated temperatures. In addition to having a stable microstructure, they require strength, ductility, fatigue- and creep-resistance with low impurity levels suitable for use in aeroengine shafts. Two chemical compositions have been designed based on thermodynamic calculations which independently investigate the suitability of the matrix and the strengthening phases for use at elevated temperatures. It is believed that substituting Ni with Cr will increase the austenite-start

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32

Cromey, Tyler. "Effect of elevated temperature on ceramic ultrafiltration of colloidal suspensions." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51778.

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The inherent thermal resistance of ceramic membranes allows for treatment of industrial waters at elevated temperatures. Traditionally, the high temperature of wastewater has been an issue compromising the integrity of polymeric membrane systems or requiring the temperature to be lowered for further treatments. In ceramic membrane systems, a decrease in viscosity with increasing temperature, however, can be utilized, which increases the permeate flux. In this study, the fouling of ceramic ultrafiltration by feed solutions containing colloidal silica was evaluated at temperatures between 25 – 9

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33

Agyakwa, Pearl. "Creep and microstructural development in P91 weldments at elevated temperature." Thesis, University of Nottingham, 2004. http://eprints.nottingham.ac.uk/11759/.

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This research concerns weldments in P91 steel and their creep behaviour. Its scope covers three main topics: the microstructure and creep response of the (i) weld metal, (ii) parent metal, and (iii) the effect of extended thermal exposure and creep on the weldments. Microstructural examination of the weld metal revealed an inhomogeneous structure, with each bead consisting of a columnar region, a coarse-grained region and a fine-grained region (the latter two regions resulting from heat-treatment of the weld bead by deposition of subsequent beads). The columnar regions exhibited high hardness

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34

Holmström, Marcus. "Design of a Carbon Fiber Thermocouple for Elevated Temperature Measurements." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279105.

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Thermocouples are one of the most commonly used instruments for thermometry at elevated temperatures. As of today, there are only a few types of thermocouples that are built to withstand a temperature beyond 1600 °C,however they usually have a temperature measurement uncertainty of around 1% at these high temperatures. Beyond the 1600 °C temperature span, most high temperature thermocouples tend to drift in the measurements, causing it to output a faulty and inaccurate read of the actual temperature. This thesis explores the usage of carbon fibers as a material to be used in thermocouples, by

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35

Kapoor, Pradeep. "Nonlinear vibrations of elastic plates and shells at elevated temperature." Thesis, University of North Bengal, 1987. http://hdl.handle.net/123456789/638.

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36

Ahlbäck, Rasmus. "Elevated temperature tests of SiC experiment for MIST : KTH Student Satellite MIST." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-275715.

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Electronics today rely heavily on silicon transistors which are unsuitable for extreme environments where temperatures potentially could reach up to 500◦C. Materials other than silicon has been proposed to solve this problem, one of which is silicon carbide. Transistors made of silicon carbide can with-stand higher temperatures than its silicon counterparts and could potentially be used for exploring hostile planets such as Venus or in high temperature applications such as sensors for engines. This project is a part of KTHs student satellite initiative which will send a satellite into orbit co

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37

Knox, Joanne Jennefer. "Aspects of modelling plain and reinforced concrete at elevated temperatures." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/7713.

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Extreme events such as the Mont Blanc Tunnel fire in 1999 (Bettelini et al. 2001) or the Windsor Tower fire in 2005 (Calavera et al. 2005) have shown how concrete failure at elevated temperatures can be hazardous to the safety of members of the public. Generally, there is an absence of understanding of the mechanical behaviour of both plain and reinforced concrete at elevated temperatures, which is essential for computational modelling. Since fire is an extreme event, a certain amount of damage within the structure would be seen to be permissible within its performance objectives. This necessi

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38

Prajapati, Kamlesh. "Properties of magnetostrictive alloys at elevated temperatures." Thesis, University of Hull, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322348.

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39

Lu, Chi. "Micro-Fabricated Hydrogen Sensors Operating at Elevated Temperatures." UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_diss/767.

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In this dissertation, three types of microfabricated solid-state sensors had been designed and developed on silicon wafers, aiming to detect hydrogen gas at elevated temperatures. Based on the material properties and sensing mechanisms, they were operated at 140°C, 500°C, and 300°C. The MOS-capacitor device working at 140°C utilized nickel instead of the widely-used expensive palladium, and the performance remained excellent. For very-high temperature sensing (500°C), the conductivity of the thermally oxidized TiO2 thin film based on the anodic aluminum oxide (AAO) substrate changed 25 times i

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40

Farooq, Muhammad. "Strengthening and degradation mechanisms in austenitic stainless steels at elevated temperature." Doctoral thesis, KTH, Materialteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122158.

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With rapid economic developments and rising living standards, the demand for electricity all over the world is greatly increased. Due to high fuel costs, the steam boilers with higher steam temperature and pressure are needed to decrease the cost of power generation throughout the world extensively. In recent years, human awareness of the gradual strengthening of environmental protection increases, therefore to reduce the CO2 emissions the power generation efficiency needs to be improved. The development of high temperature materials with improved creep rupture strength and oxidation resistanc

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41

Antolovich, Bruce F. "Fatigue crack propagation in single crystal CMSX-2 at elevated temperature." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/14880.

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42

Muggelberg, Christiane. "The surface structures of uranium dioxide studied by elevated temperature STM." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389177.

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43

Zong, Bernie Yaping. "Strength and fracture of a metal matrix composite at elevated temperature." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260733.

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44

Mansour, Morkous Shoukry. "Fundamental study of premixed combustion rates at elevated pressure and temperature." Thesis, University of Leeds, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.535670.

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45

Moon, Hyung-Soo 1969. "Design of Si/SiC hybrid structures for elevated temperature micro-turbomachinery." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/29222.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references.<br>thermal softening behavior at temperatures above 900 K. This thermal softening behavior limits the turbine inlet temperature, which in turn significantly degrades the overall engine efficiency. Previous studies have shown that hybrid structures of silicon and silicon carbide have good potential for improved eng

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46

Darr, Shehla. "Compression recovery of rigid polymer foams following confinement at elevated temperature." Thesis, Kingston University, 2007. http://eprints.kingston.ac.uk/20383/.

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Cellular materials are all around us. They can be found in nature as in bone, wood, leaves and even in our food. In the last fifty years, man has produced many synthetic cellular materials: firstly with polymeric foams and more recently with foamed metals, ceramics and glass. Polymer foams are used in a variety of applications ranging from coffee mugs to the feet of the Apollo Lunar Module, for which they were used as shock absorbers. This project was aimed at understanding the recovery from long-term compression of rigid polymer foams. Understanding the dynamics involved in the recovery proce

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47

Rounthwaite, Nicholas James. "Development of bulk nanoquasicrystalline alloys for high strength elevated temperature applications." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:47bdc219-1733-40c1-ac6b-dbd5fc08f175.

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Al93Fe3Cr2Nb2 (at.%) nanoquasicrystalline alloys have been shown to have the potential to push the applications of aluminium alloys to more elevated temperatures, by maintaining a high strength. They also have more thermally stable microstructures than previous nanoquasicrystalline alloys from similar systems (the most studied of which is Al93Fe3Cr2Ti2 (at.%)). Al93Fe3Cr2Nb2 (at.%) alloys have never previously been produced in samples on a scale larger than melt-spun ribbon. This study examines the production parameters of bulk nanoquasicrystalline Al-Fe-Cr-Nb alloys. Firstly an attempt was ma

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48

Allen, Benjamin William. "Creep and Elevated Temperature Mechanical Properties of 5083 and 6061 Aluminum." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/52630.

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With the increasing use of aluminum in naval vessels and the ever-present danger of fires, it is important to have a good understanding of the behavior of aluminum at elevated temperatures. The aluminum samples 5083-H116 and 6061-T651 were examined under a variety of loading conditions and temperatures. Tensile testing was completed on both materials to measure strength properties of elastic modulus, yield strength, and ultimate strength as well as reduction of area from room temperature to 500 deg C taking measurements every 50 deg C. These tests showed how much the material weakened as tempe

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49

Goodrich, Thomas William. "Thermophysical Properties and Microstructural Changes of Composite Materials at Elevated Temperature." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/35900.

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Experimental methods were developed and used to quantify the behavior of composite materials during heating to support development of heat and mass transfer pyrolysis models. Methods were developed to measure specific heat capacity, kinetic parameters, microstructure changes, porosity, and permeability. Specific heat and gravimetric data for kinetic parameters were measured with a simultaneous differential scanning calorimeter (DSC) / thermogravimetric analyzer (TGA). Experimental techniques were developed for quantitative specific heat measurement based on ASTM standards with modifications fo

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50

Shah, Manan Kanti. "Material Characterization and Forming of Light Weight Alloys at Elevated Temperature." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306939665.

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