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Dissertations / Theses on the topic 'Aluminium-copper alloy'

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Published: 3 June 2025
Last updated: 31 July 2025

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1

Pridham, M. S. "The high temperature stability of aluminium/lithium based alloys containing copper and magnesium." Thesis, University of Nottingham, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376649.

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2

Akinlabi, Esther Titilayo. "Characterisation of dissimilar friction stir welds between 5754 Aluminium alloy and C11000 copper." Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1536.

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Friction Stir Welding (FSW) is a solid state welding process invented and patented by The Welding Institute (TWI) in 1991, for joining ferrous and non-ferrous materials1. The FSW of Aluminium and its alloys has been commercialised; and recent interest is focused on joining dissimilar materials. However, in order to commercialise the process, research studies are required to characterise and establish process windows. This research work through material characterisation of the welded joints establishes a process window for the Friction Stir welding of 5754 Aluminium Alloy and C11000 Copper. Fur
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3

Sivakumar, V. "Processing, Characterization And Evaluation Of A Functionally Graded Ai - 4.6% Cu Alloy." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/183.

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In some applications the stress across the entire cross-section of a component is not uniform but varies with position. For example, maximum shear stress is highest at the inner surface of a thick-walled cylinder subjected to uniform internal pressure and it decreases continuously towards the outer surface. In such applications it would be more appropriate for the component, too, to have varying strength across the cross-section matching with the stress profile it is subjected to. The present work deals with obtaining such a functionally graded material (FGM), characterizing it and testing its
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4

Sivakumar, V. "Processing, Characterization And Evaluation Of A Functionally Graded Ai - 4.6% Cu Alloy." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/183.

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In some applications the stress across the entire cross-section of a component is not uniform but varies with position. For example, maximum shear stress is highest at the inner surface of a thick-walled cylinder subjected to uniform internal pressure and it decreases continuously towards the outer surface. In such applications it would be more appropriate for the component, too, to have varying strength across the cross-section matching with the stress profile it is subjected to. The present work deals with obtaining such a functionally graded material (FGM), characterizing it and testing its
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5

Wu, Weili. "The modeling of hot tearing in aluminium alloy." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2003. http://theses.uqac.ca.

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6

Fahad, Noor. "Experimental study of oxidation, ignition and combustion of aluminum based nanomaterials." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8777.

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Aluminum based reactive nanomaterials have extensive applications in many fields including solid propellants, pyrotechnics, and catalytic reactions. One recent example is the novel concept of using nanostructured energetic particles for energy storage where the controlled exothermic reaction is the key to control the energy release process. It is of primary interest to understand the thermodynamics, kinetics, morphological and structural properties of these particles during the exothermic reaction. While the physiochemical properties of the monometallic powders are determined only by their siz
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7

Harboe, Siri Johanna [Verfasser]. "Investigation of Rheological and Microstructural Properties of Semi-Solid Aluminium Copper Alloy during Isothermal Shear : Untersuchung der rheologischen und mikrostrukturellen Eigenschaften von teilerstarrten Aluminium-Kupfer Legierungen während isothermischen Scherens / Siri Johanna Harboe." Aachen : Shaker, 2017. http://d-nb.info/1149278382/34.

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8

Tomaszewski, Tomasz. "Wykorzystanie minipróbek do wyznaczania trwałości i wytrzymałości zmęczeniowej." Rozprawa doktorska, Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy, 2015. http://dlibra.utp.edu.pl/Content/838.

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Praca dotyczy problematyki identyfikacji własności zmęczeniowej dla próbek o małych wymiarach. Badania eksperymentalne w zakresie zmęczenia wysokocyklowego przeprowadzono dla dwóch materiałów konstrukcyjnych (stop aluminium, miedź)
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9

Unsworth, Paul. "Spectroscopic studies of metal alloys and semiconductor interfaces." Thesis, University of Liverpool, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343647.

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10

Delacroix, Jessica. "Etude des mécanismes de fissuration en fatigue et/ou fretting d'alliages Al-Cu-Li." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00740238.

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Ces travaux sont consacrés à l'étude des mécanismes prépondérants pouvant intervenir dans l'endommagement en fretting-fatigue pour des alliages Al-Cu-Li. Afin d'apporter des réponses, une importante étude expérimentale a été menée en 3 sections distinctes : comportement en fatigue avec concentration de contrainte dans la pièce; résistance à l'endommagement en fretting; essais de fretting-fatigue. Un effort particulier est réalisé pour déterminer l'influence de la microstructure sur ces différents mécanismes. Dans les conditions testées en fatigue, les matériaux étudiés présentent des durées de
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11

George, Faith Olajumoke. "Chromium-free conversion coating of aluminium-copper alloys." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/chromiumfree-conversion-coating-of-aluminiumcopper-alloys(5176c8af-02af-44a8-a47f-44b5a0c2585c).html.

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Aluminium alloys are frequently pre-treated by a conversion coating before application of an organic coating in order to improve the corrosion resistance and adhesive properties of the surface and the corrosion resistance provided by the system. Chromate-containing conversion coatings are commonly used for this purpose. However, legislation limits future use of hexavalent chromium compounds due to their toxic and carcinogenic nature. Therefore, alternative, so-called chromium-free conversion coatings are being developed that are more environmentally-compliant.The purpose of the present work ha
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12

PAOLETTI, CHIARA. "Analisi del comportamento a creep di leghe a struttura cfc: sviluppo di un modello basato su parametri fisici." Doctoral thesis, Università Politecnica delle Marche, 2021. http://hdl.handle.net/11566/287754.

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Per descrivere la dipendenza della velocità minima di creep da stress e temperatura si ricorre all’equazione di Norton o relazioni derivate della legge di potenza, mentre nelle lavorazioni a caldo solitamente viene utilizzata l'equazione di Garofalo (sinh). Entrambe queste equazioni sono di natura fenomenologica e di rado possono essere correlate in modo univoco ai parametri microstrutturali. Per superare questa carenza, negli ultimi anni è stato sviluppato da Sandtröm un modello base per lo studio del creep dei metalli fcc che non prevede parametri di adattamento e completamente prevedibile.
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13

Williams, J. R. "Corrosion of aluminium-copper-magnesium metal matrix composites." Thesis, University of Nottingham, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239852.

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14

De, Bono Paola. "Laser welding of copper and aluminium alloys for electrical interconnects." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6898/.

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The adoption of lithium-ion and/or super-capacitor battery technologies is a current hot topic in the automotive industry. For both battery types, the terminals and busbars are manufactured from copper (Cu) and/or aluminium-based (Al-based) alloys, as a result of their high electrical and thermal conductivities. Laser welding is considered an attractive process to industry due to its easy auto-motability, high processing speed and highly repeatable cost-effective processing. However, laser welding of monometallic and dissimilar Cu and A1 presents several difficulties due to the high surface re
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15

Touzé, Stéphane. "Laser Metal Deposition of Aluminium-Copper alloys for Repair applications." Thesis, Ecole centrale de Nantes, 2019. http://www.theses.fr/2019ECDN0025.

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Ce travail de thèse vise à démontrer la faisabilité de la réparation de pièces de fonderie à haute performance et haute valeur ajoutée faites d’un alliage aluminiumcuivre en utilisant un procédé de fabrication additive métallique par projection de poudre avec fusion laser dénommé Laser Metal Deposition. Ces alliages présentent notamment une faible soudabilité et ne peuvent donc être réparés de façon fiable par des procédés traditionnels de soudage à l’arc. Afin de permettre l’utilisation de ce procédé innovant pour la réparation de pièces en alliage Al-Cu, des difficultés majeures ont dû être
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16

Giroux, François. "Développement d'une méthode de test d'electromigration au niveau plaquette : Application a des filières ULSI." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0149.

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L'electromigration est devenue un facteur majeur de limitation de la fiabilite des interconnexions. Dans un contexte industriel, le developpement de methodes de test accelere au niveau plaquette est aujourd'hui une necessite. Nous commencons cette these en evoquant les bases physiques de l'electromigration et les materiaux metalliques utilises pour realiser les interconnexions en microelectronique. Le chapitre suivant presente les differentes methodes et procedures de test de l'electromigration: test de duree de vie en etuve, tests tres acceleres sur plaquette, tests resistometriques, mesure d
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17

Nielsen, Øyvind. "Mushy zone permeability and grain morphology in equiaxed aluminium-copper alloys." Doctoral thesis, Norwegian University of Science and Technology, Department of Materials Technology, 2000. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1486.

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18

Garrett, Sharon Ann. "A study of inhibitors of the corrosion of aluminium-copper alloys." Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295314.

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19

Kear, Gareth. "Electrochemical corrosion of marine alloys under flowing conditions." Thesis, University of Portsmouth, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369433.

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20

Khudur, Ivan. "Aluminium alloys ability to catalyse the oxidation of biodiesel : Development of a procedure to test alloys." Thesis, KTH, Kraft- och värmeteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215060.

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Biodiesel is a renewable and biodegradable fuel that has the possibility to replace conventional diesel fuel and reduce the environmental pollution. Despite its environmental benefits, it has been shown to cause damage to the vehicle engines, due to its oxidative properties. Different metals, such as copper, zinc and aluminium are present in the vehicle fuel system and have been shown to catalyse the oxidation of biodiesel. Several studies have been performed to investigate the interaction between these metals and fuel. However, some reports concluded contradicting results when it comes to the
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21

Forde, John. "The elevated temperature performance of cast aluminium alloys and the development of a cast aluminium-copper metal matrix composite." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/6419/.

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The first phase of this thesis characterised the currently commercially available L169 and A201 aluminium alloys in terms of their response to testing at the operating parameters predicted for next generation aero-engine components. The L169 and A201 alloys were initially subjected to ageing trials at 205°C, specimens of both alloys were then fatigue tested at ambient temperature and at 205°C following 1000 hours exposure at 205°C. Detailed micrographic characterisation was undertaken to assess the impact of prolonged elevated temperature exposure on the alloy microstructure. Fractography was
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22

Cheng, Ming-Yi. "An experimental investigation into tool wear in micro-drilling of aluminium, aluminium/copper metal alloys and carbon fibre reinforced composites." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/14613.

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Limitation of conventional machining equipment has become a growing concern over the past two decades due to the demands for greater machining accuracy in today’s manufacturing. The development of micro-machining has therefore attracted significant attention; it signifies the advancement of national economy as well as the level of accuracy manufacturing industry could achieve. While the connection between tool lifespan, cost of machining and throughput is well established, the factor of tool lifespan appears to have more significance since the miniaturization of tool could lead to further perf
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23

Roy, Normand. "Étude paramétrique de l'évolution de la porosité dans le système Al-9%Si-3%Cu /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1994. http://theses.uqac.ca.

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24

Srivastava, Vivek. "Low stress creep of copper and some aluminium and magnesium alloys at high and intermediate homologous temperatures." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398484.

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25

Tahiri, Hicham. "Les effets des paramètres métallurgiques sur les caractéristiques des intermétalliques de fer et sur la phase silicium eutectique dans les alliages Al-Si-Cu (319) /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2003. http://theses.uqac.ca.

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26

Fuloria, Devashish. "Characterisation of semi-solid deformation behaviour of aluminium-copper alloys via combined X-ray microtomography and finite element modelling." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/4405.

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The production of aluminium sheet is expensive and energy intensive despite the reduced environmental impact during use. Twin roll casting is a method of directly producing aluminium alloys in near net shape directly to sheet at a fraction of the energy costs of conventional DC casting/hot rolling. It also requires a fraction of the capital cost. Although sheet can be produced, defects (segregates, surface bleeds, buckling, etc.) can arise which limit the range of alloys which can be cast. This project aims to elucidate the complex mechanisms causing these defects through a combined experiment
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27

Li, Zheng. "Paramètres contrôlant la précipitation et la dissolution de la phase CuAl2 du cuivre dans les alliages d'aluminium de type 319 et leurs influences sur la performance /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2003. http://theses.uqac.ca.

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28

Villeneuve, Carl. "Neutralisation et dissolution des intermétalliques de fer dans les alliages Al-Si /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1998. http://theses.uqac.ca.

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29

Cunha, Rodrigo Potenza da. "Caracterização mecânica e metalográfica de uma liga de alumínio empregada para cabeçote de motor flex." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-08032013-115751/.

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Hoje em dia na indústria automobilística há uma grande necessidade em diminuição de custos e de peso no carro e isso pode ser o diferencial na concorrência da indústria automobilística. A substituição de materiais pesados por materiais mais leves é uma tendência mundial na indústria automobilística, além disso, existe também a necessidade de diminuir as etapas de processo. O tratamento térmico é uma etapa que tem um gasto muito grande de energia consequentemente é uma etapa muito cara do processo e ligas não tratáveis termicamente pode acarretar em economia de processo. O cabeçote de motor é u
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30

Gauthier, Jean. "Effet du traitement thermique sur les propriétés mécaniques, la microstructure et la fractographie pour l'alliage Al-Si-Cu-Mg /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1994. http://theses.uqac.ca.

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31

Elhadad, Shimaa. "Effect of trace elements on the microstructure and porosity formation in 319 type Al-Si-Cu alloys." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2003. http://theses.uqac.ca.

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32

Martins, Meco Sonia Andreia. "Joining of steel to aluminium alloys for advanced structural applications." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/10288.

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When joining steel to aluminium there is a reaction between iron and aluminium which results in the formation of brittle intermetallic compounds (IMC). These compounds are usually the reason for the poor mechanical strength of the dissimilar metallic joints. The research on dissimilar metal joining is vast but is mainly focused on the automotive industry and therefore, the material in use is very thin, usually less than 1 mm. For materials with thicker sections the present solution is a transition joint made by explosion welding which permits joining of steel to aluminium and avoids the format
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33

TREVISAN, FRANCESCO. "Study and characterisation of different metal alloys processed through Laser Powder Bed Fusion." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2709711.

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Additive Manufacturing (AM) techniques inspired a substantial revolution in the way of concept and produce metal components for industry. Among all the available AM processes, Laser Powder Bed Fusion (LPBF) inspired a noticeable series of investments, studies and standardisation routes since the great interested it acquired in several industrial sectors. In the past years numerous researchers demonstrated how this process produces metal components with innovative and unprecedented microstructures and mechanical properties, disclosing new horizons in the scientific and industrial research. T
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34

Romаnszki, L., M. Mohos, J. Telegdi, and L. Nyikos. "Contact Angle Measurement is an Efficient Tool for the Characterization of Corrosion Pro-tection Nanolayers on Copper Alloys and Stainless Steel." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35254.

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With the advent of the nano-era, a pronounced interest in the nanolayers has emerged. The develop-ment of more and more sophisticated measurement devices and techniques made possible the visualiza-tion, characterization and investigation of nanolayers. However, there exists a variety of simple, old means which should not be despised either. In this work, the use of contact angle measurement as a simple, fast, inexpensive and accessible tool for the study of surfaces with and without nanolayers is demonstrated. Furthermore, it is evidenced that in contrast to its simplicity, contact angle measu
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35

CASINI, JULIO C. S. "Influência da substituição do cobalto por estanho e cobre na microestrutura e propriedades elétricas em ligas a base de LaMgAlMnCoNi." reponame:Repositório Institucional do IPEN, 2015. http://repositorio.ipen.br:8080/xmlui/handle/123456789/24068.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2015-10-28T11:21:27Z No. of bitstreams: 0<br>Made available in DSpace on 2015-10-28T11:21:27Z (GMT). No. of bitstreams: 0<br>Tese (Doutorado em Tecnologia Nuclear)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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Rosa, Daniel Monteiro. "Caracterização da microestrutura dendritica na solidificação vertical descendente de ligas AL-CU." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264716.

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Orientador: Amauri Garcia<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-04T03:07:36Z (GMT). No. of bitstreams: 1 Rosa_DanielMonteiro_M.pdf: 7995773 bytes, checksum: 8859b8e785820d46c1b77212d7acaa31 (MD5) Previous issue date: 2004<br>Resumo: Os espaçamentos dendríticos são parâmetros microestruturais importantes, resultantes do processo de solidificação. Eles afetam os perfis de microssegregação e governam a formação de segundas fases na região interdendrítica, influenciando, conseqüentemente, as propried
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Wang, Yun. "Solidification microstructure selection and coupled eutectic growth in Al-Fe and Al-Fe-Mn alloys." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324449.

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38

Proni, Cecilia Tereza Weishaupt 1959. "Avaliação da tixoconformabilidade das ligas AA 2011 e AA 2014." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264031.

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Orientador: Eugênio José Zoqui<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-16T15:58:35Z (GMT). No. of bitstreams: 1 Proni_CeciliaTerezaWeishaupt_M.pdf: 17001263 bytes, checksum: 25c148a2e84c82f917de77b96b714fb6 (MD5) Previous issue date: 2010<br>Resumo: A tixoconformação é uma técnica de processamento de materiais no estado semi-sólido que permite a produção de peças com geometrias near net shape com melhores propriedades mecânicas e com razoável redução no custo final de produção, se comparados aos mé
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LEE, GUN-HWAN. "Contribution a l'etude de la caracterisation experimentale de l'adhesion par le test a la rayure : effet du traitement de surface avant depot." Nantes, 1989. http://www.theses.fr/1989NANT2015.

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Determination, par une analyse statistique deduite de la methode de weibull, de la charge critique moyenne comme parametre fiable de l'adhesion entre un depot et son substrat. Etude, dans le cas du couple cu/al etr de depots de sio::(2), de l'influence de la preparation de la surface du substrat sur le parametre d'adhesion
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40

Roulin, Gilles. "Etude des premiers stades de mise en ordre dans les alliages martensitiques du système cuivre-aluminium." Rouen, 1997. http://www.theses.fr/1997ROUES085.

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Dans un intervalle de composition étroit autour de Cu3Al, le système Cu-Al présente des caractéristiques particulièrement intéressantes concernant les phénomènes ordre-désordre. Tout d'abord, il existe à basse température une phase d'équilibre ordonnée à longue période : la phase 2. Cette phase peut être obtenue par trempe à partir de l’état à haute température suivie d'un revenu prolongé. Par ce procédé, l'évolution structurale passe, à la trempe, par une première transformation ordre-désordre, interrompue par une transformation martensitique, puis, au revenu, par une deuxième transformation
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Eid, Marco Antonio. "Analise da solidificação sob fluxo de calor radial cilindrico." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265184.

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Orientador: Rezende Gomes dos Santos<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-09T22:01:50Z (GMT). No. of bitstreams: 1 Eid_MarcoAntonio_M.pdf: 19245694 bytes, checksum: b272ecb88a2fa2a6affcf2a60d7e8d47 (MD5) Previous issue date: 2007<br>Resumo: Apesar da importância tecnológica da solidificação de ligas metálicas sob fluxo de calor radial, relativamente poucos estudos estão sendo feitos nessa área. Neste trabalho, a solidificação da liga Al 4,5%Cu em molde de aço radial cilíndrico é analisada e comp
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42

Delacour, Pascal. "Etude en microscopie analytique par transmission d'alliages renforcés par oxydation interne et de martensites du système Cu-Al. Importance du coherent bremsstrahlung dans la microanalyse X de ces alliages." Rouen, 1994. http://www.theses.fr/1994ROUES073.

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La première partie de ce travail constitue une étude en MET et en EDS de l'évolution des précipités formés par oxydation interne d'un alliage Cu-0,3% Al en fonction de la progression du front d'oxydation provoquée par des traitements thermiques appropriés. L'évolution des précipitations homogènes et hétérogènes a pu être suivie et la composition des précipités a été dans une large mesure identifiée. Au cours de ce travail, les analyses EDX ont montré l'existence de pics qui se sont révélés dus au Coherent Bremsstrahlung. L'importance de ce phénomène, qui peut fausser les analyses nous a condui
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43

Wan, Chuangeng. "Étude de la liaison métal-alumine élaborée par voies liquide et solide : mouillage, thermocompression." Grenoble INPG, 1992. http://www.theses.fr/1992INPG0023.

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La premiere partie de cette etude a ete consacree a la conception de deux nouveaux alliages de brasure de l'alumine en visant des caracteristiques optimales pour l'utilisateur. L'essentiel du travail a consiste en une etude des proprietes de mouillage, realisee par la methode de la goutte posee sous vide pousse, avec les deux alliages cupdti et nifecrsiti sur substrats mono et polycristallins d'alumine. Les interfaces et les produits de reaction ont ete caracterises par rugosimetrie, microscopie electronique a balayage et micro-analyse, et les resultats discutes a l'aide d'arguments thermodyna
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Griveau, Jean-Christophe. "Etude de composés fermions lourds supraconducteurs sous hautes pressions : CECU2SI2 et UPD2AL3." Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10252.

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L'objet de cette these est l'etude des composes fermions lourds supraconducteurs cecu#2si#2 et upd#2al#3 sous pression dans leur phase normale et supraconductrice par resistivite electrique (p#a#c) et par susceptibilite magnetique alternative (#a#c). Les mesures ont ete effectuees en conditions quasi-hydrostatiques (steatite) et hydrostatiques (#4he). Les mesures par resistivite electrique se sont effectuees sous champ magnetique : un diagramme hc#2(t) a ete etabli sous pression pour les deux composes. Pour cecu#2si#2, l'etude sur monocristal en resistivite electrique sous champ magnetique et
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45

Giroud, Franck. "Elaboration et études des propriétés de transport de couches minces quasicristallines AlCuFe." Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10251.

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Ce travail est consacre a l'elaboration, la caracterisation structurale et microstructurale, ainsi qu'a l'etude de la conductivite electrique de couches minces de l'alliage quasicristallin alcufe. Les echantillons ont ete fabriques par evaporation sequentielle des elements constitutifs de l'alliage, puis traitement thermique. Nous avons etudie les chemins reactionnels conduisant a la phase quasicristalline par diffraction des rayons x lors du traitement thermique de tricouches metalliques. La phase quasicristalline peut etre obtenue quelle que soit la sequence d'empilement du tricouche. Nous m
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46

Benali, Anouar. "Etude ab initio d'alliages AlCu : phénomènes de ségrégation et modification de la réactivité de surface vis-à-vis de O." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0048/document.

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En présence d'éléments d'alliage, l'aluminium présente d'excellentes propriétés mécaniques, obtenues grâce à un durcissement structural (alliages Al/Cu/Mg). Ces alliages constituent ainsi des matériaux largement utilisés dans le domaine de l'aéronautique. De plus, l'aluminium possède la capacité à former en présence d'oxygène un oxyde très stable qui conduit à des revêtements utilisables à hautes températures et présentant une bonne résistance à l'oxydation et à la corrosion dans un environnement agressif. Vu les enjeux économiques associés à ces propriétés, la compréhension des phénomènes à l
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47

Rajendran, Anbukkarasi. "Studies on Friction Stir Welding of Aluminium AA2024 Alloy to Pure Copper." Thesis, 2018. http://etd.iisc.ac.in/handle/2005/4197.

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Aluminium-copper joints are widely used in electrical applications due to their unique properties. However, joining of these metals by conventional welding techniques is restricted due to the formation of brittle (bulk size) intermetallic phases.As the other solid-state welding techniques are restricted to a particular joint geometry and they are time-consuming, Friction Stir Welding (FSW) technique is used in the present work to join AA2024 and pure Cu, which resulted in distribution of Cu particles in the stir zone. The nature and distribution of these particles, along with the nature and th
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Yadav, Deepak. "Cyclic Nano-Indentation study of Sintered Aluminium and Aluminium-Copper Alloy Reinforced (Cu66Zr34) Metallic Glass Composites: A Molecular Dynamics Study." Thesis, 2018. http://ethesis.nitrkl.ac.in/9576/1/2018_MT_216MM2457_DYadav_Cyclic.pdf.

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Molecular dynamics (MD) simulations are carried out for cyclic nano-indentation on sintered metal (Al)-metallic glass (Cu66Zr34) reinforced composites termed as composite-I and on sintered alloy(Al-4%Cu)-metallic glass (Cu66Zr34)termed as composite-II to measure the hardness, stiffness and reduced young modulus.I ndenter radius, and indentation speed effects on the load-displacement behavior, hardness, stiffness, and young modulus has been studied. Depth-sensing cycling nano-indentation is studied to assess depth-dependent plastic deformation of
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Das, A., and G. Singh. "Plastic deformation and failure studies near a void for copper-aluminium alloy via molecular dynamics simulation." Thesis, 2014. http://ethesis.nitrkl.ac.in/6152/1/E-63.pdf.

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Molecular Dynamics (MD) simulations of uniaxial as well as for biaxial tension at nano-scale was carried out for different strain rates and at different temperatures on Cu50Al50 alloy specimen having a void in order to investigate the nature of deformation as well as fracture near the void. It was seen that failure occurred in a similar manner to what is observed at macro scale i.e. by several voids formation, coalescence of void these voids into cracks leading to failure of the specimen. The engineering Stress-Strain diagram observed for the specimen showed a series of fluctuations in the str
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Cho, Jae-Ik. "Microsegregation of copper in aluminium casting alloys." 2003. http://www.library.wisc.edu/databases/connect/dissertations.html.

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