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Dissertations / Theses on the topic 'Mechanical and microstructural properties'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Cormier, Joseph Michael. "Microstructural and Mechanical Properties of Human Ribs." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/10137.

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The direction of osteons in cortical bone has been shown to be well correlated with the strongest loading direction of the bone as a whole. Therefore, determining the orientation of osteons in the rib cage is an important step in understanding the behavior of the rib cage under mechanical load. A total of 37 specimens were removed from several rib locations from a male and female cadaver. Eight histological slides were created from each 5 mm long section. Image analysis included the use of a computer algorithm created in Matlab to track the center of each osteon throughout the rib section. Ana

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2

Johnson, Lindsay W. "The mechanical and microstructural analysis of the human cornea." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/17065.

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3

Witek, S. R. "Microstructural and mechanical properties of alumina ceramics incorporating zirconia." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37900.

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4

Subedi, Samikshya. "Evaluation of Microstructural and Mechanical Properties of Multilayered Materials." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/802.

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Microstructure controls many physical properties of a material such as strength, ductility, 1density, conductivity, which, in turn, determine the application of these materials. This thesis work focuses on studying microstructural features (such as grain size, shape, defects, orientation gradients) and mechanical properties (such as hardness and yield strength) of multilayered materials that have undergone different loading and/or operating conditions. Two materials that are studied in detail are 18 nm Cu-Nb nanolaminates and 3D printed Inconel 718. Copper-Niobium (Cu-Nb) nanolaminate is a hig

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5

Morgan, David Scott. "A microstructural and mechanical analysis of perforation of aluminum alloys." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/16361.

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6

Clopet, Caroline Roberta. "Microstructural evolution and mechanical properties of deeply undercooled eutectic alloys." Thesis, University of Leeds, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.713488.

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An experimental investigation has been undertaken in an attempt to determine the mechanism of formation of anomalous eutectics. A melt fluxing method and a drop tube technique have been used to undercool eutectic Ag-Cu alloy. During the fluxing experiments, the growth fronts of the undercooled alloy samples have been monitored using high speed camera imaging. The evolved microstructures of the fluxed samples undercooled ≤ 60 K exhibit a trizonal structure consisting of mixed anomalous and lamellar eutectic. The high speed camera imaging reveals that the growth front propagates in a spasmodic m

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7

Wei, Yun. "Microstructural characterization and mechanical properties of super 13% Cr steel." Thesis, University of Sheffield, 2005. http://etheses.whiterose.ac.uk/12826/.

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Super 13% Cr steels are used for offshore applications and have to meet strict tensile strength, yield strength, toughness, elongation, and hardness specifications. The mechanical properties of these steels are strongly dependent on the proportions of retained austenite and martensite, and consequently small changes in heat treatment parameters result in major changes in properties. In this work, a detailed investigation of the effect of heat treatment parameters on microstructural features, hardness and tensile properties of the commercial supermartensitic 13Cr-5Ni-2Mo steels in the asreceive

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8

Katyal, Bhavana. "Microstructural features in sheared suspensions : probability wake an triplet correlation." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/11259.

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9

McHale, Paul F. "Factors influencing the microstructural and mechanical properties of ULCB steel weldments." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28206.

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10

Hameed, Asad. "Microstructural characterisation and mechanical properties of an extruded nanoquasicrystalline aluminium alloy." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:827c5108-4e51-4f24-a2f5-b882eaa795f2.

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Conventional aluminium alloys rapidly lose mechanical strength above 150°C, limiting their elevated temperature usage in engineering applications. The rapidly solidified (RS) nanoquasicrystalline (NQX) Al<sub>93</sub>Fe<sub>3</sub>Cr<sub>2</sub>Ti<sub>2</sub> alloy has the potential to be used at elevated temperatures (250-350°C) as it retains high strength at those temperatures. There have been some microstructural studies and limited work on the mechanical properties of the alloy. However, a detailed study of both the microstructure and the mechanical properties (elastic constants, tensile b

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11

Eğilmez, Mehmet Özyüzer Lütfi. "Microstructural, electrical and mechanical properties of MgB2/Mg metal matrix composites/." [s.l.]: [s.n.], 2004. http://library.iyte.edu.tr/tezler/master/malzemebilimivemuh/T000467.pdf.

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12

He, Wei. "Mechanical and microstructural properties of thin metal films on compliant substrates." Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2280/document.

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Le comportement mécanique de films minces métalliques déposés sur des substrats souples joue un rôle déterminant dans les performances de l'électronique flexible et des micro- systèmes électromécaniques (MEMS).Dans un premier temps, une nouvelle méthode est présentée pour caractériser le module d'élasticité de films minces submicroniques. Avec deux couches déposées de chaque côté et sur la moitié du substrat polymère, la corrélation d'image numérique (CIN) a été utilisée pour mesurer simultanément la déformation du film et du substrat in situ au cours d'un essai de traction. La différence entr

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13

Reck, Victor. "Mechanical and microstructural properties of ultra-low carbon bainitic steel weld metal." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA302955.

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14

Bayliss, Roger W. "The sintering, microstructural analysis and mechanical properties of two β' MgSiAlON ceramics". Thesis, University of Warwick, 1986. http://wrap.warwick.ac.uk/2823/.

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This work describes the preparation and the determination of some properties of two magnesium SiAlON ceramics, one with a low substitution level and one with a high substitution level ' phase. Each had a specific amount of spinel as second phase which would form on sintering or after a post-sintering heat-treatment. The work was undertaken because (a) the improvement in the properties of pressureless-sintered yttrium SiAlON ceramics was not as high as anticipated and (b) by applying the knowledge gained with the widely researched yttrium system to the MgSiAlON ceramic system, the properties of

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15

Harris-Pointer, Cheryl Faye. "A study of the microstructural and mechanical properties of novel spring steels." Thesis, Sheffield Hallam University, 1998. http://shura.shu.ac.uk/19763/.

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This work is concerned with track spring components manufactured by Pandrol from a SiMn alloy in the quenched and tempered condition. For many years low to medium carbon based spring steel has been manufactured via an oil quench temper route producing components with suitable mechanical and microstructural properties. The current problem facing the spring manufacturer with the traditional heat treatment route involve a number of technical issues including a sensitivity to temper embrittlement and susceptibility to stress corrosion cracking. In addition, economic factors and component handling

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16

Eriksson, Philip. "Evaluation of mechanical and microstructural properties for laser powder-bed fusion 316L." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-355882.

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This thesis work was done to get a fundamental knowledge of the mechanical and microstructural properties of 316L stainless steel fabricated with the additive manufacturing technique, laser powder-bed fusion (L-PBF). The aims of the thesis were to study the mechanical and microstructural properties in two different building orientations for samples built in two different machines, and to summarize mechanical data from previous research on additive manufactured 316L. Additive manufacturing (AM) or 3D-printing, is a manufacturing technique that in recent years has been adopted by the industry du

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17

Werenskiold, Jens Christofer. "Equal channel angular pressing (ECAP) of AA6082 : mechanical properties, texture and microstructural development." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Natural Sciences and Technology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-894.

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<p>This thesis deals with the concept of ECAP applied to a commercial Al Mg-Si alloy (AA6082.50). A detailed analysis of the strains introduced by ECAP in a single passage through the die has been made, based on direct measurements on partially pressed samples. </p><p>Further, the mechanical properties of ECAP’ed samples have been investigated. The effect of initial material temper and post-ECAP artificial aging was investigated in addition to the effect of strain accumulation and processing route.</p><p> Finally, a detailed study of the textural and microstructural development was made. The c

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18

Fabian, Robert. "The influence of microstructural features on the mechanical properties of Magsimal®-59." Thesis, Jönköping University, Tekniska Högskolan, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-51943.

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19

Qian, Feng. "Microstructural evolution of Mn-based maraging steels and their influences on mechanical properties." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/9459/.

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A set of Mn-based maraging TRIP steels was designed by Max-Planck-Institut für Eisenforschung GmbH (MPIE) for light weight and safe automotive applications. According to their research, these Mn-based maraging TRIP steels exhibited a simultaneous increase in both strength and ductility upon aging. They attributed this surprising effect to the combination of precipitation strengthening mechanism and TRIP effect of reverted/retained austenite. This thesis carried out a further study on this type of steels with minor modification of chemical composition (7-12 wt.% Mn, with additional ~ 1 wt.% Al)

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20

Ketchion, Stephen Martin. "The processing, microstructural evaluation and mechanical properties of SiC dispersoid reinforced Si3N4 composites." Thesis, University of Warwick, 1992. http://wrap.warwick.ac.uk/110523/.

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A range of composites have been prepared by dispersing various sources of SiC whiskers and platelets into a Si3N4 based matrix intended for high temperature applications. The main objective was to improve the fracture toughness of the Si3N4 monolith without any detrimental effect on other properties such as the excellent high temperature deformation behaviour. The matrix composition was tailored so that the intergranular phase formed desirable crystallisation products within the Si3N4 - Si2N20- Y2Si207 phase system. A slip casting technique was used to prepare the composites, in order to prefe

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21

Moleejane, Cullen Mayuni. "An experimental investigation of the effect of microstructural features on mechanical properties of EN8 steel." Thesis, Cape Peninsula University of Technology, 2009. http://hdl.handle.net/20.500.11838/1254.

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Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2009.<br>Materials in almost all components are subjected to some kind of loading that must be correctly predicted to produce reliable designs. The understanding of a material's properties significantly impacts appropriate selection for a structure. This kind of material characterization is also important in the development of improved or new materials for high strength and novel applications. There are numerous metallurgical variables (composition and process parameters) that influence the physical and mec

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22

Dong, S., Y. Wang, Ashraf F. Ashour, B. Han, and J. Ou. "Nano/micro-structures and mechanical properties of ultra-high performance concrete incorporating graphene with different lateral sizes." Elsevier, 2020. http://hdl.handle.net/10454/17889.

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Yes<br>The performance of cement-based materials can be controlled and tailored by adjusting the characteristics of reinforced nano inclusions. Therefore, the lateral size effect of graphene on the nano/micro-structures of ultra-high performance concrete (UHPC) was explored, and then the mechanical properties were investigated to analyze the structure–property correlation of composites in this paper. The test results show that due to nucleation site effect and the formation of core–shell elements, incorporating graphene with lateral size of > 50 µm improves the polymerization degree and mean m

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23

Appiah, Kwadwo Ampofo. "Microstructural and microanalytical characterization of laminated (C-SiC) matrix composites fabricated by forced-flow thermal-gradient chemical vapor infiltration (FCVI)." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/14910.

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24

Riggs, Christopher Michael. "The relationship between mechanical function and microstructural properties of cortical bone in the racehorse." Thesis, Royal Veterinary College (University of London), 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319530.

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25

Miller, A. J. "The effect of microstructural parameters on the mechanical properties of non-crimp fabric composites." Thesis, Cranfield University, 1996. http://dspace.lib.cranfield.ac.uk/handle/1826/11119.

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Textile composites are being considered for use in aerospace primary structures as they have the potential to reduce the cost of manufacturing composite structures. Non-Crimp Fabrics (NCFS) are one class of textile composites which are being investigated for this use. The aim of this project was to determine what affect the fabric structure of the NCF has on the larninates microstructure and in turn what affect this has on the final mechanical properties. After an explanation of the need for textile composites a review of the advantages and disadvantages of the different classes is presented.

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26

Yi, Jangho. "Effect of Microstructural Parameters on Mechanical Properties and Fracture in α+β Titanium Alloy". Doctoral thesis, Kyoto University, 2019. http://hdl.handle.net/2433/244547.

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京都大学<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第22066号<br>工博第4647号<br>新制||工||1725(附属図書館)<br>京都大学大学院工学研究科材料工学専攻<br>(主査)教授辻伸泰, 教授安田秀幸, 教授宇田哲也<br>学位規則第4条第1項該当<br>Doctor of Philosophy (Engineering)<br>Kyoto University<br>DFAM

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27

Alawadhi, Meshal Y. "Microstructural evolution and mechanical properties of oxygen-free copper processed by severe plastic deformation." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/415750/.

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This thesis presents a study on the microstructural evolution and mechanical properties of oxygen-free copper processed by equal-channel angular pressing (ECAP) and high-pressure torsion (HPT) at room temperature. Experiments were systematically conducted to examine microstructural stability and deformation mechanisms, and their influence on the mechanical properties. A significant grain refinement was attained after deforming the material by 24 passes of ECAP and 10 turns of HPT. The microstructure in the steady-state condition consisted of equiaxed ultrafine grains (UFGs) with high-angles of

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28

Bei, Guo-Ping. "Synthesis, microstructural characterization and mechanical properties of nanolaminated Ti3AlxSn(1-x)C2 MAX phases." Poitiers, 2011. http://nuxeo.edel.univ-poitiers.fr/nuxeo/site/esupversions/9a20805b-0e53-47c0-8b16-c1a4ac3c2042.

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Les travaux exposés dans cet ouvrage portent sur l'élaboration, la caractérisation microstructurale et les propriétés mécaniques de solutions solides nanolamellaires de phases dites MAX. Les phases MAX représentent une classe exceptionnellement étendue de céramiques. Elles répondent à une formule générale du type Mn+1AXn (n=1, 2 ou 3) où M est un métal de transition, A est un métal des groupes IIIA ou IVA, et X est un métalloïde (C ou N). Nous avons dans un premier temps réalisé l'optimisation de la synthèse, par métallurgie des poudres, de Ti3AlC2 pur. Une nouvelle phase, Ti3SnC2, ayant été d

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29

Williams, Robert A. "A microstructural and mechanical property correlation of friction stir processed nickel aluminum bronze." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sep%5FWilliams%5FR.pdf.

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30

Horrigan, Emma. "Disordered microstructures and anomalous mechanical properties." Thesis, University of Exeter, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496775.

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This study concerns the effects of structural heterogeneity upon mechanical properties, particularly on negative Poisson's ratio. Two separate methods were used to generate two-dimensional honeycombs optimised for a series of material properties, in particular large negative Poisson's ratio and high stiffness. The properties and heterogeneity of crumpled and recycled materials were compared.

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MERLIN, Mattia. "CORRELATION BETWEEN MICROSTRUCTURAL AND MECHANICAL PROPERTIES OF ALUMINUM ALLOY CASTINGS PRODUCED BY DIFFERENT FOUNDRY PROCESSES." Doctoral thesis, Università degli studi di Ferrara, 2009. http://hdl.handle.net/11392/2389203.

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Aluminum is quite a new material and the production of aluminumalloy castings has greatly increased in the last recent years. Nowadays, there is a continuous market requirement to produce lighter vehicles and to increase fuel efficiency, therefore roughly two thirds of all aluminum castings production is within the automotive field. Even though the applications of aluminum in this scenario are considerable, some aspects affecting the quality and the soundness of cast products are still not fully understood. The aim of the research work presented in this PhD thesis was to study the corr

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32

Colman, Charlotte. "Gypsum residues in fine recycled aggregates : effects on mechanical and microstructural properties of cementitious composites." Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Lille Douai, 2020. http://www.theses.fr/2020MTLD0012.

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Les sables recyclés représentent un flux important de déchets provenant de la démolition d’anciennes structures en béton. Ils ne sont jusqu’à présent pas valorisés à cause d’une absorption d’eau élevée, d’une densité plus faible et d’une teneur en fines plus importante que dans les granulats naturels. De plus, ils sont souvent contaminés par des sulfates. Ces sulfates pourraient provenir du plâtre du bâtiment démoli ou du ciment résiduel qui est couramment présent dans ces matériaux. Le taux de sulfate recommandé pour les granulats recyclés est inférieur à 0,2 % en masse selon la norme EN206,

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MELO, FRANCISCO C. L. de. "Efeito de aditivos na sinterizacao de carbeto de boro." reponame:Repositório Institucional do IPEN, 1994. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10407.

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34

Zamani, Mohammadreza. "Al-Si Cast Alloys - Microstructure and Mechanical Properties at Ambient and Elevated Temperature." Licentiate thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH. Forskningsmiljö Material och tillverkning – Gjutning, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-26805.

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Aluminium alloys with Si as the major alloying element form a class of material providing the most significant part of all casting manufactured materials. These alloys have a wide range of applications in the automotive and aerospace industries due to an excellent combination of castability and mechanical properties, as well as good corrosion resistance and wear resistivity. Additions of minor alloying elements such as Cu and Mg improve the mechanical properties and make the alloy responsive to heat treatment. The aim of this work is studying the role of size and morphology of microstructural

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35

Hasan, Md Nazmul. "Microstructure and mechanical properties of a CrMnFeCoNi high-entropy alloy with gradient structures." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23036.

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High-entropy alloys (HEAs) that demonstrate excellent mechanical properties over steel-based alloys are not exempt from the common dilemma of strength–ductility trade-off, which limits their potential applications. One way to improve the property of CrMnFeCoNi HEA is by using the rotationally accelerated shot peening technique to introduce a gradient structure. Two gradient profiles—a thin gradient layer with an undeformed core and a fully deformed structure—are introduced by adjusting the processing parameters. The effects of these gradient profiles on mechanical properties and microstructura

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36

Wang, Ning. "Microstructures and mechanical properties of nanocrystalline materials." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ28077.pdf.

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37

Butson, A. M. "Effect of cooling rate on the microstructural and mechanical properties of the γ-titanium aluminide TNB". Thesis, Swansea University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636190.

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The current research was commissioned to assess the effect of cooling rate from a previously optimised solution heat treatment on a gamma titanium aluminide alloy considered for commercial application as an aerofoil in a gas turbine engine at temperatures up to 700°. The effect of cooling rate on microstructural evolution and a range of mechanical properties was assessed. Ultimately a methodology of lifing gamma titanium aluminides is proposed. The gamma titanium aluminide, ‘TNB’, of nominal composition Ti-45 A1-Nb-0.2C (wt.%) was evaluated. The optimised solution heat treatment involved a soa

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Smith, J. J. "Microstructural characterisation of duplex 316 weld metals : The effects on the mechanical and high temperature properties." Thesis, University of Southampton, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384218.

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Stritch, Kyle B. "Microstructural Evolution and Mechanical Properties in Simulated Heat Affected Zone Regions of Grade 91 Steel Welds." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471444438.

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Tant, Joseph. "The influence of second phases on the microstructural evolution and the mechanical properties of geological materials." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/the-influence-of-second-phases-on-the-microstructural-evolution-and-the-mechanical-properties-of-geological-materials(d51de894-09a3-413e-adf7-ca2dc7788ced).html.

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Polycrystalline geological materials are not normally single phase materials and commonly contain second phases which are known to influence the grain size and mechanical properties of bulk material. Despite the well documented significance of second phases, there are relatively few detailed systematic experimental studies of the effect of second phases on isostatic high temperature grain growth in geological materials. Grain growth is a process that is fundamental to our understanding of how rocks behave in the lower crust / upper mantle where grain size is considered to play an important rol

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Araya, Rivera Nicolás Ignacio. "Influence of heat treatments on the microstructural evolution and mechanical properties of self-lubricating sintered steel." reponame:Repositório Institucional da UFSC, 2016. https://repositorio.ufsc.br/xmlui/handle/123456789/168221.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Florianópolis, 2016.<br>Made available in DSpace on 2016-09-20T05:04:22Z (GMT). No. of bitstreams: 1 340635.pdf: 3912420 bytes, checksum: 3da6e9bc99fb124fe20226106ae4105b (MD5) Previous issue date: 2016<br>A pesquisa e desenvolvimento de materiais autolubrificantes estão diretamente associados com o desejo de diminuir o consumo de energia em aplicações onde lubrificantes fluidos são indesejados. Pesquisar e caracterizar as suas propriedades se t

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Turetta, Alberto. "Investigation on thermal, mechanical and microstructural properties of quenchenable high strenght steels in hot stamping operations." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425096.

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Sheet metal working operations at elevated temperature have gained in the last years even more importance due to the possibility of producing parts characterized by high strength-to-mass ratio. In particular, the hot stamping of ultra high strength quenchenable steels is nowadays widely used in the automotive industry to produce body-in-white structural components with enhanced crash resistance and geometrical accuracy. The optimization of the process, where deformation takes place simultaneously with cooling, and of the final component performances requires the utilization of FE-based codes w

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Fan, Zhongyun. "Microstructure and mechanical properties of multiphase materials." Thesis, University of Surrey, 1993. http://epubs.surrey.ac.uk/776187/.

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A systematic method for quantitative characterisation of the topological properties of two-phase materials has been developed, which offers an effective way for the characterisation of twophase materials. In particular, a topological transformation has been proposed, which allows a two-phase microstructure with any grain size, grain shape and phase distribution to be transformed into a three-microstructural-element body (3-E body). It has been shown that the transformed 3·E body is mechanically equivalent along the aligned direction with the original microstructure. The Hall·Petch relation dev

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44

Zheng, Hang. "Tempcore reinforcing steel : microstructure and mechanical properties." Phd thesis, Department of Civil Engineering, 1998. http://hdl.handle.net/2123/8671.

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45

Davies, Thomas Marc. "Microstructure and mechanical properties of fibrin gels." Thesis, Swansea University, 2009. https://cronfa.swan.ac.uk/Record/cronfa42760.

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This thesis reports an extensive study of the structural and rheological characteristics of the three-dimensional fibrin clot network. The importance of blood clotting in the area of NanoHealth is testified to by the fact that complications due to thrombosis accounts for about 10 per cent of all deaths in hospitals in the UK. It is therefore imperative to understand the clotting process of blood as fully as possible. The techniques implemented include confocal laser scanning microscopy, and rheo logical methods such as Fourier transform mechanical spectroscopy. Both techniques provide a founda

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Facchinelli, Nicola. "Microstructural and technological optimisation of magnesium alloys." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3426654.

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Magnesium is one of the most abundance element in nature, and it's characterised by a lower density than aluminium. These characteristics confer great potential to magnesium alloys, which are so used for specialised applications, like for military purposes and in the aerospace industry. While some magnesium alloys, including the AM60B alloy, are historically associated to high pressure die casting, for such applications the magnesium alloy components are usually produced by the gravity casting process, in order to minimise the defect's content and to achieve better castings' mechanical propert

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Nagaraja, Srinidhi. "Microstructural Stresses and Strains Associated with Trabecular Bone Microdamage." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14093.

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Bone is a composite material consisting of hydroxyapatite crystals deposited in an oriented manner on a collagen backbone. The arrangement of the mineral and organic phases provides bone tissue with the appropriate strength, stiffness, and fracture resistance properties required to protect vital internal organs and maintain the shape of the body. A remarkable feature of bone is the ability to alter its properties and geometry in response to changes in the mechanical environment. However, in cases of metabolic bone diseases or aging, bone can no longer successfully adapt to its environment, inc

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KOLI, YASHWANT. "MECHANICAL AND MICROSTRUCTURAL CHARACTERIZATION OF DISSIMILAR JOINT OBTAINED BY GMAW USING COLD METAL TRANSFER (CMT)." Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2021. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18773.

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This research work focuses on a comparative study on weld bead geometries of three different welding techniques: Cold Metal Transfer (CMT), Metal Inert Gas Pulse Synergic (MIG P) and MIG Manual Standard (MIG M). Bead-on-plate tests were performed using ER4043 (AlSi5%) as a filler material on the 3.18 mm thick plates of AA6061-T6. Current (80 A, 100 A and 120 A) and welding speed (7.5, 10.5 and 13.5 mm/sec) were used as input process parameters while shielding gas flow rate and contact tip to workpiece distance (CTWD) were maintained constant as 15 l/min and 10mm respectively. The weld b

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Garcia, de la Cruz Lucia. "Ultrafine grained nickel processed by powder metallurgy : microstructure, mechanical properties and thermal stability." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMC224.

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La synthèse par métallurgie des poudres de nickel à grains ultrafins (UFG) a été effectuée, et l’effet de l’affinement de la microstructure sur le comportement mécanique et les propriétés physiques a été étudié. La possibilité de coupler le broyage et le frittage flash est étudiée avec des résultats prometteurs. Des échantillons de haute densité avec des tailles de grains d = 0.65 – 4 µm, caractérisés par une fraction élevée des joints de grains Σ3 et un faible niveau de contrainte ont été synthétisés. Les propriétés mécaniques des échantillons UFG montrent une bonne combinaison ductilité-rési

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Saeidi, Kamran. "Stainless steels fabricated by laser melting : Scaled-down structural hierarchies and microstructural heterogeneities." Doctoral thesis, Stockholms universitet, Institutionen för material- och miljökemi (MMK), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-129055.

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Additive manufacturing is revolutionizing the way of production and use of materials. The clear tendency for shifting from mass production to individual production of net-shape components has encouraged using selective laser melting (SLM) or electron beam melting (EBM). In this thesis, austenitic, duplex and martensitic stainless steel parts were fabricated by laser melting technique using fixed laser scanning parameters. The fabricated steel parts were characterised using XRD, SEM, TEM/STEM, SADP and EBSD techniques. Mechanical properties of the fabricated steel parts were also measured. The

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