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Dissertations / Theses on the topic 'Deformation phase'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

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1

Singh, Shiv Brat. "Phase transformations from deformed austenite." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246513.

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2

Sandala, Rebecca Sarah. "Deformation mechanims of two-phase titanium alloys." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/deformation-mechanims-of-twophase-ttitanium-alloys(50a395c3-70f6-49f7-a3df-41d2f899a851).html.

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Two-phase Ti6246 alloy is a light weight material exhibiting very high strength at higher temperatures compared to the commonly used Ti64 alloy. This particular alloy is used at the later stages of compressor discs within the aero engines. However, compressor discs undergo a number of cyclic stresses, which could eventually lead to fatigue failure. In order to optimize the microstructure for design and lifing models, an improved understanding of the localised deformation mechanisms is crucial, particularly at the surface, as cracks can be initiated leading to failure and in turn affect the lif

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3

Djazeb, Mohammad Reza. "High temperature deformation of two-phase Al-alloys." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/46282.

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4

Hedström, Peter. "Deformation and martensitic phase transformation in stainless steels /." Luleå : Department of Applied Physics and Mechanical Engineering, Division of Engineeing Materials, Luleå University of Technology, 2007. http://epubl.ltu.se/1402-1544/2007/67/.

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5

Kismarahardja, Ade Wijaya. "The Deformation-Induced Phase Transformation in Gold Nanoribbons." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23034.

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The tensile experiment for nanomaterials in a transmission electron microscope (TEM) has become a very important tool to study the atomic deformation of material at nanoscale. An enormous amount of effort has been spent to perform the tensile experiments on nanomaterials. They revealed new discoveries that have never been observed in bulk materials and eventually lead to further applications. In this thesis, experimental reports of tensile test on gold nanoribbons in TEM were reported. The gold nanoribbons have 4H structure but the FCC structure could coexist in some areas. Gold nanoparticles

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6

Sinclair, Chad. "Co-deformation of a two-phase FCC/BCC material /." *McMaster only, 2001.

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7

Jenkins, Brent Allan. "Phase transformations and deformation metallography in dilute uranium alloys." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670343.

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8

Yamaguchi, Masashi. "Phase-field simulation of dendritic growth under externally applied deformation." Diss., University of Iowa, 2011. https://ir.uiowa.edu/etd/2792.

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Defects, i.e. hot tears, macrosegragation, and pores, formed in metal castings are a result of stresses and strains in the solid-liquid mushy zone. Numerical simulation of solidification of deforming dendrite crystal promises to improve insight into the mechanical behavior of mushy zones under an applied load. The primary goal of this thesis is to develop numerical methodologies for performing solidification simulation of deforming dendrites. Such simulation encounters difficulties associated with the interface dynamics due to phase change or interaction among the dendrites, and large visco-pl

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9

Hill, Thomas. "Evolution of second phase particles with deformation in aluminium alloys." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/evolution-of-second-phase-particles-with-deformation-in-aluminium-alloys(e87af2eb-bf04-46d5-9b51-d44d4584c579).html.

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The effect of high temperature, high strain rate deformation on the evolution of second phase particles in commercial aluminium alloys has been investigated. Three model alloys provided by Novelis have been examined, and the evolution of particles during deformation has been examined for the alloy that most closely resembles the composition of alloys used in commercial applications. The effect of deformation mechanisms was expected to be an enhancement of diffusion controlled processes; therefore the first part of the work was to develop a heat treatment that would produce a fine distribution

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10

Zhang, Nianxian. "Processing of a two-phase alloy by severe plastic deformation." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/388051/.

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This thesis presents a systematic study on evolutions of microstructure, microhardness and superplasticity of a Pb-62% Sn alloy processed by both equal-channel angler pressing (ECAP) and high-pressure torsion (HPT) and the subsequent self-annealing process at room temperature (RT). The Pb-Sn alloy exhibits characteristics with significant grain refinement after processing by ECAP and HPT but with a reduction in the hardness values by comparison with the initial as-cast condition. For HPT processing, it is shown that there are generally smaller grains at the edges of the discs by comparison wit

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11

Belchev, Borislav Stefanov, and University of Lethbridge Faculty of Arts and Science. "Deformation quantization for contact interactions and dissipation." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Physics and Astronomy, c2010, 2010. http://hdl.handle.net/10133/2490.

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This thesis studies deformation quantization and its application to contact interactions and systems with dissipation. We consider the subtleties related to quantization when contact interactions and boundaries are present. We exploit the idea that discontinuous potentials are idealizations that should be realized as limits of smooth potentials. The Wigner functions are found for the Morse potential and in the proper limit they reduce to the Wigner functions for the infinite wall, for the most general (Robin) boundary conditions. This is possible for a very limited subset of the values of the

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12

Keïta, Mohamed. "Texturing of a TiAl alloy via hot deformation and phase transformations." Electronic Thesis or Diss., Université de Lorraine, 2024. http://www.theses.fr/2024LORR0141.

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Dans cette étude, une analyse expérimentale approfondie a été réalisée sur la compression à haute température (1280°C) d'un alliage TiAl TNM, visant à comprendre l'évolution de sa microstructure et de sa texture sous diverses conditions de déformation. Un dilatomètre a permis d'effectuer la compression à haute température, et la diffraction des rayons X à haute énergie (HEXRD - Synchrotron) a fourni des informations in-situ sur la transformation de phase et la texture. Le SEM-EBSD (Microscopie Électronique à Balayage - Diffraction des Électrons Rétrodiffusés) a permis de corréler l'orientation

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13

Kalu, Peter Nwankwo. "The deformation of some two-phase Al-alloys at elevated temperatures." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38061.

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14

Mazinani, Mohammad. "Deformation and fracture behaviour of a low-carbon dual-phase steel." Thesis, University of British Columbia, 2006. http://hdl.handle.net/2429/30951.

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The primary goal of this study was to evaluate the effect of martensite plasticity on the deformation and fracture behaviour of an intercritically annealed commercial low carbon (0.06 wt.%) dual phase steel. The volume fraction and the morphology (banded and almost equiaxed) of the martensite phase were systematically varied by control of the intercritical annealing temperature and the heating rate to this temperature. It was observed that the yield and tensile strengths were dependent on the martensite content but not on the martensite morphology. On the other hand, the true uniform str

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15

Gayle, Frank Wentzel. "Phase transformations and deformation behavior in the aluminum-lithium-zirconium system." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15262.

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Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1985.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE.<br>Vita.<br>Includes bibliographical references.<br>by Frank Wentzel Gayle.<br>Sc.D.

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16

Pelemo, David Ayo. "High temperature deformation of a two phase titanium alloy IMI-550." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47217.

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17

Sircar, S. "The deformation and annealing behaviour of some two-phase aluminium alloys." Thesis, University of Manchester, 1994. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488374.

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18

Wang, Liu Sheng. "Shape and deformation measurement of 3D surface using phase stepping speckle interferometry." Thesis, Nottingham Trent University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386409.

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19

Lainé, Steven John. "The role of twinning in the plastic deformation of alpha phase titanium." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267425.

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The optimisation of compressor stage aerofoil and fan blade design remains an important area of titanium alloy research and development for aerospace gas turbines. Such research has important implications for critical and sensitive component integrity and efficiency. In particular, a better understanding of how deformation twinning interacts with microstructural features in titanium alloys is required, because such twinning facilitates plastic deformation at a higher strain rate than dislocations. To investigate this behaviour, commercial purity titanium and the titanium alloy Ti–6Al–4V were s

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20

Хоменко, Олексій Віталійович, Алексей Витальевич Хоменко, Oleksii Vitaliiovych Khomenko, et al. "Modeling of phase dynamics and kinetics of fragmentation at severe plastic deformation." Thesis, Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна Національної академії наук України, 2015. http://essuir.sumdu.edu.ua/handle/123456789/41631.

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21

Al-Sawai, Wael. "Non-equilibrium Phase Transitions in Interacting Diffusions." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7660.

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The theory of thermodynamic phase transitions has played a central role both in theoretical physics and in dynamical systems for several decades. One of its fundamental results is the classification of various physical models into equivalence classes with respect to the scaling behavior of solutions near the critical manifold. From that point of view, systems characterized by the same set of critical exponents are equivalent, regardless of how different the original physical models might be. For non-equilibrium phase transitions, the current theoretical framework is much less developed. In par

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22

DE, KERMERCHOU GUERBERT SYLVIE. "Les hematies en contraste de phase dans les hematuries : experience amienoise et revue de la litterature." Amiens, 1992. http://www.theses.fr/1992AMIEM030.

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23

Kiwanuka, Robert. "Micro-deformation and texture in engineering materials." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:3c924d01-7501-4d59-bb53-07e6584e50c5.

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This DPhil project is set in the context of single crystal elasticity-plasticity finite element modelling. Its core objective was to develop and implement a methodology for predicting the evolution of texture in single and dual-phase material systems. This core objective has been successfully achieved. Modelling texture evolution entails essentially modelling large deformations (as accurately as possible) and taking account of the deformation mechanisms that cause texture to change. The most important deformation mechanisms are slip and twinning. Slip has been modelled in this project and care

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24

Marco, Breda. "Phase stability in Duplex stainless steels." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423521.

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This thesis summarizes the work performed during the research activities developed in the three-years course of scientific training for the attainment of the Doctor of Philosophy degree. The research was mainly focused on the study of the physical metallurgy of Duplex stainless steels, a particular class of stainless steels having a biphasic austeno-ferritic microstructure, with the aim to characterize their microstructural stability as a consequence of heat treatments and cold plastic deformation. The choice of the research topic was dictated by the increasing use of these steels for industr

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25

Sjögren, Torsten. "Influences of the Graphite Phase on Elastic and Plastic Deformation Behaviour of Cast Irons." Doctoral thesis, Linköpings universitet, Konstruktionsmaterial, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8776.

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The amount and morphology of the graphite phase largely controls the resulting properties of cast iron. For instance, in flake graphite cast irons the mechanical properties are low while the thermal conductivity is high. This is in contrast with spheroidal graphite cast irons where the mechanical properties are high and the thermal conductivity is low. These differences are due to the different graphite morphologies and must be accounted for in the design work and material selection of cast iron components. In this work the influence of the graphite phase on the elastic and plastic deformation

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26

Sjögren, Torsten. "Influences of the graphite phase on elastic and plastic deformation behaviour of cast irons /." Jönköping : Linköping : Department of Mechanical Engineering, School of Engineering, Jönköping University ; Department of Management and Engineering, Linköping University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8776.

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27

Dair, Benita Jean 1973. "Characterization, orientation, and deformation behavior of the double gyroid phase in elastomeric triblock copolymers." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/85251.

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28

Wang, Haopeng. "Confined crystallization, crystalline phase deformation and their effects on the properties of crystalline polymers." Case Western Reserve University School of Graduate Studies / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1246041849.

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29

Hou, Duen-Huei. "Phase stability, mechanical properties and deformation mechanisms in B2-ordered Nb-Ti-Al alloys /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487857546385251.

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30

Feng, Zhiyao. "The Deformation-induced Martensitic Phase Transformation in Low Chromium Iron Nitrides at Cryogenic Temperatures." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1526306156203016.

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31

Monserrat, Hernández Oriol. "Deformation measurement and monitoring with Ground-Based SAR." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/81557.

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The Ground-Based Synthetic Aperture Radar (GB-SAR) is a relatively new technique, which in the last ten years has gained interest as deformation measurement and monitoring tool. The GB-SAR technique is based on an imaging radar-based sensor, which o ers high sensitivity to small displacements, in the region of sub-millimetres to millimetres, long-range measurements, which can work up to some kilometres, and massive deformation measurement capability. These features confer to the GB-SAR technique interesting advantages with respect to

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32

Karewar, Shivraj. "Atomistic Simulations of Deformation Mechanisms in Ultra-Light Weight Mg-Li Alloys." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc801888/.

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Mg alloys have spurred a renewed academic and industrial interest because of their ultra-light-weight and high specific strength properties. Hexagonal close packed Mg has low deformability and a high plastic anisotropy between basal and non-basal slip systems at room temperature. Alloying with Li and other elements is believed to counter this deficiency by activating non-basal slip by reducing their nucleation stress. In this work I study how Li addition affects deformation mechanisms in Mg using atomistic simulations. In the first part, I create a reliable and transferable concentration depen

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33

Hofmann, Tobias [Verfasser], and Heiko [Akademischer Betreuer] Andrä. "Phase-Field Methods for Deformation Processes in Lithium-Ion Batteries / Tobias Hofmann ; Betreuer: Heiko Andrä." Kaiserslautern : Technische Universität Kaiserslautern, 2018. http://d-nb.info/1156901499/34.

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34

Benafan, Othmane. "Deformation and Phase Transformation Processes in Polycrystalline NiTi and NiTiHf High Temperature Shape Memory Alloys." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5123.

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The unique ability of shape memory alloys (SMAs) to remember and recover their original shape after large deformation offers vast potential for their integration in advanced engineering applications. SMAs can generate recoverable shape changes of several percent strain even when opposed by large stresses owing to reversible deformation mechanisms such as twinning and stress-induced martensite. For the most part, these alloys have been largely used in the biomedical industry but with limited application in other fields. This limitation arises from the complexities of prevailing microstructural

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35

UEHARA, Takuya, Takato TAMAI, and Nobutada OHNO. "Molecular Dynamics Simulations of Shape-Memory Behavior Based on Martensite Transformation and Shear Deformation." The Japan Society of Mechanical Engineers, 2006. http://hdl.handle.net/2237/9014.

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36

Nippress, Stuart. "Subduction body force stresses, deformation and mantle seismic anisotropy at the 410 and 660km phase transitions." Thesis, University of Liverpool, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420748.

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37

Zhao, Yuchen. "Multi-scale study of mechanical behaviour of two-phase materials during large deformation and ductile damage." Thesis, Troyes, 2017. http://www.theses.fr/2017TROY0018.

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Cette thèse est dédiée à l’étude du comportement élasto-plastique des matériaux polycristallins multiphasés ainsi que de l’endommagement ductile à différentes échelles. Les hétérogénéités microscopiques ont une influence importante sur la réponse mécanique macroscopique des matériaux. Et l’endommagement ductile est encore difficile à mesurer aux échelles fines. Cette thèse traite des problématiques suivantes : 1. L’évolution du comportement des phases et des grains sous chargements jusqu’à la rupture.2. L’influence de l’hétérogénéité intrinsèque au niveau micro, sur le comportement macroscopiq

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38

Gérard, Yves. "Etude experimentale des interactions entre deformation et transformation de phase : exemple de la transition calcite-aragonite." Rennes 1, 1987. http://www.theses.fr/1987REN10146.

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39

Lv, Duchao. "A Multi-Scale Simulation Approach to Deformation Mechanism Prediction in Superalloys." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1469009668.

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40

Mraizika, Florence. "Evolutions microstructurales en compression à chaud des alliages de titane betacez et 6246 et influence du forgeage sur la transformation [beta] -> [alpha]." Grenoble INPG, 1996. http://www.theses.fr/1996INPG4206.

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Les relations entre les gammes thermomecaniques et les microstructures des alliages de titane sont encore insuffisament connues. Ce travail se propose d'ameliorer la connaissance des etats structuraux resultant du forgeage beta et de ceux resultant de la transformation beta vers alpha-beta ulterieure. Les influences des deux parametres taux et vitesse de deformation sur les evolutions microstructurales et texturales se produisant lors du forgeage ainsi que de la transformation beta/alpha sont systematiquement explorees. Les evolutions texturales mettent en evidence une augmentation de la compo

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41

Wehrenberg, Christopher. "Phase transformations in shock compacted magnetic materials." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43595.

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Shock compaction experiments were performed on soft magnetic phases Fe₄N and Fe₁₆N₂, and hard magnetic phases Nd₂Fe₁₄B and Sm₂Fe₁₇N₃ in order to determine their thermo-mechanical stability during shock loading and explore the possibility of fabricating a textured nanocomposite magnet. Gas gun experiments performed on powders pressed in a three capsule fixture showed phase transformations occurring in Fe₄N, Fe₁₆N₂, and Nd₂Fe₁₄B, while Sm₂Fe₁₇N₃ was observed to be relatively stable. Shock compaction of FCC Fe₄N resulted in a partial transformation to HCP Fe₃N, consistent with previous reports of

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42

Oberson, Paul Gregory. "An experimental and theoretical Investigation of the low temperature creep deformation behavior of single phase titanium alloys." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3983.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2006.<br>Thesis research directed by: Material Science and Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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43

MIRJALILI, Mojtaba. "Numerical Analysis of a Large-Scale Levee on Soft Soil Deposits Using Two-Phase Finite Deformation Theory." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/126785.

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44

Ceccato, Francesca. "Study of large deformation geomechanical problems with the Material Point Method." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424697.

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The numerical simulation of real geomechanical problems often entails an high level of complexity; indeed they are often characterized by large deformations, soil-structure interaction and solid-fluid interaction. Moreover, the constitutive behavior of soil is highly non-linear. Landslides, dam failure, pile installation, and undrground excavation are typical examples of large deformation problems in which the interaction between solid a fluid phase as well as the contact between bodies are essential. This thesis addresses the challenging issue of the numerical simulation of large deforma

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45

Nechaev, Yury S. "Stimuli and mechanisms of diffusion mass-transport in the processes of structural-phase changes in metallic materials under high-rate deformation: Stimuli and mechanisms of diffusion mass-transport in the processesof structural-phase changes in metallic materials under high-rate deformation." Diffusion fundamentals 2 (2005) 52, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14385.

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46

Okitsu, Yoshitaka. "FABRICATION OF ULTRAFINE GRAINED STEELS WITHOUT SEVERE PLASTIC DEFORMATION AND THEIR APPLICATION TO AUTOMOBILE BODY STRUCTURES." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157630.

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47

Schappert, Klaus Bernhard [Verfasser], and Rolf [Akademischer Betreuer] Pelster. "Confinement effects in nanopores : elastic properties, phase transitions, and sorption-induced deformation / Klaus Bernhard Schappert. Betreuer: Rolf Pelster." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2014. http://d-nb.info/1054328056/34.

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48

Gläser, Dennis [Verfasser], and Bernd [Akademischer Betreuer] Flemisch. "Discrete fracture modeling of multi-phase flow and deformation in fractured poroelastic media / Dennis Gläser ; Betreuer: Bernd Flemisch." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2020. http://d-nb.info/1218532319/34.

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49

Lours, Philippe. "Mecanismes de deformation plastique de la phase gamma prime du superalliage cmsx2 : etude par microscopie electronique "in situ"." Toulouse 3, 1989. http://www.theses.fr/1989TOU30059.

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La phase gamma prime du superalliage cmsx2 a la structure l12 ordonnee. Elle presente un accroissement de limite elastique avec la temperature contrairement aux materiaux classiques. Le memoire comporte quatre parties: - la premiere rappelle les principales caracteristiques des superalliages. - la deuxieme partie presente la technique de deformation in situ: elle consiste a reproduire, a l'interieur meme du microscope electronique et dans une large gamme de temperatures (25c a 1000c), les conditions reelles de l'essai de traction. - la troisieme partie propose une simulation numerique de la re

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50

YU, DAPENG. "Etude des defauts et de la deformation plastique de la phase quasicristalline t2 du systeme al-li-cu." Paris 11, 1993. http://www.theses.fr/1993PA112274.

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Notre etude a ete consacree a l'analyse d'une part des defauts de structure et d'autre part du comportement de la deformation plastique de la phase quasicristalline t2 du systeme al-li-cu, aussi bien que des imperfections induites par la deformation. De veritables defauts ont ete observes et etudies par microscopie electronique a transmission dans les echantillons non deformes. Ces defauts se presentent soit sous la forme de defauts lineaires (dislocations), de defauts planaires (sous-joint de grains et faute d'empilement) ou encore sous la forme de structures modulees. Un essai de deformation

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