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Tesis sobre el tema "Machining of titanium alloys"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 13 de febrero de 2022

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1

Haron, Che Hassan Che. "Machining of titanium alloys with coated and uncoated carbide tools." Thesis, Coventry University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262998.

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2

Pretorius, Cornelius. "Machining of titanium alloys with ultra-hard cutting tool materials." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4385/.

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This research explores the relative merits of existing and novel ultra-hard tool materials for finish turning titanium alloys. Phase 1 of the experimental work comprised evaluating the machinability of Ti-6Al-2Sn-4Zr-6Mo when employing carbide tooling with respect to tool life, wear behaviour, workpiece surface integrity and cutting forces. The machinability of Ti-6Al-2Sn-4Zr-6Mo using PCBN tooling was evaluated in Phase 2 experiments. It was shown that even with the use of high pressure jet cooling, carbide and low content PCBN grade inserts were unsuitable for high-speed (~200 m/min) finish

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3

Shokrani, Chaharsooghi Alborz. "Cryogenic machining of titanium alloy." Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636532.

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Materials which are both lighter and stronger have faced an increased demand over the past decades to fulfil the requirements across a range of industrial applications. More specifically, demands for titanium alloys have increased significantly due to its high strength to weight ratio which is particularly attractive for increasing fuel efficiency in aircrafts and cars and is also used in biomedical implants. Despite the increasing demand for titanium made products, machining titanium alloys remains a significant challenge. High material strength and hardness lead to excessive heat generation

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4

Pervaiz, Salman. "Investigation Cooling and Lubrication Strategies for Sustainable Machining of Titanium Alloys." Licentiate thesis, KTH, Maskin- och processteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170769.

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The manufacturing sector is one of the most rapidly growing sectors in the industrialized world today. Manufacturing industry is concerned with being more competitive and profitable. Profit margins are directly related to the productivity of the company, and productivity improvements can be achieved by making manufacturing processes more efficient and sustainable. Knowledge of cutting conditions and their impact on machined surface and tool life enable productivity improvement. These days the main emphasis is not only to increase productivity, but also to make processes cleaner and more envir

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5

Shi, Qi (Alex). "Recycling of titanium alloys from machining chips using equal channel angular pressing." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/19515.

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During the traditional manufacturing route, there are large amount of titanium alloys wasted in the form of machining chips. The conventional recycling methods require high energy consumption and capital cost. Equal channel angular pressing (ECAP), one of the severe plastic deformation techniques, has been developed to recycle the metallic machining chips. The purpose of the PhD work is to realize the ECAP recycling of titanium alloys, in particular Ti-6Al-4V and Ti-15V-3Cr-3Al-3Sn, and investigate the effects of processing parameters on the resultant relative density, microstructure evolution

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6

Bui, Van Hung. "Strategies in 3 and 5-axis abrasive water jet machining of titanium alloys." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30218.

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L'alliage de titane est généralement utilisé pour les pièces structurelles aéronautiques ayant une taille importante et ainsi que des parois minces tout en devant résister à des efforts considérables. L'usinage de ces pièces est difficile avec les méthodes classiques telles que le fraisage, car les forces de coupe sont élevées et les parois minces peuvent être facilement déformées. L'usinage de l'alliage de titane (Ti6Al4V) par un procédé utilisant un jet d'eau abrasif (AWJ) peut potentiellement être utilisé pour remplacer les méthodes d'usinage conventionnelles. Cependant, la compréhension de

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7

Crawforth, Pete. "Towards a micromechanistic understanding of imparted subsurface deformation during machining of titanium alloys." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/7155/.

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Current surface integrity practice, generally applied by mechanical engineers, characterises macroscopic features such as surface tearing, chip smearing and general deformation of grains in the direction of cutting; with little emphasis placed on subsurface microstructure damage. However, through the exploitation of electron backscatter diffraction (EBSD) it has been possible to show the role microstructure plays during metal removal and further quantify the level of deformation that remains after the component has been machined. From the significant amount of data acquired, it has been possib

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8

Dawood, Abdulhameed Alaa. "A Study on the Sustainable Machining of Titanium Alloy." TopSCHOLAR®, 2016. http://digitalcommons.wku.edu/theses/1566.

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Titanium and its alloy (Ti-6Al-4V) are widely used in aerospace industries because of their light weight, high specific strength, and corrosion resistance. This study conducted a comparative experimental analysis of the machinability of Ti-6Al-4V for conventional flood coolant machining and sustainable dry machining. The effect of cutting speed, feed rate, and depth of cut on machining performance has been evaluated for both conditions. The machining time and surface roughness were found to be lower in dry machining compared to flood coolant machining. The tool wear was found to be unpredictab

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9

Ray, Nathan. "Correlation between machining monitoring signals, cutting tool wear and surface integrity on high strength titanium alloys." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/20660/.

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It is widely accepted that tool wear has a direct impact on a machining process, playing a key part in surface integrity, part quality, and therefore, process efficiency. By establishing the state of a tool during a machining process, it should be possible to estimate both the surface properties and the optimal process parameters, while allowing intelligent predictions about the future state of the process to be made; thus ultimately reducing unexpected component damage. This thesis intends to address the problem of tool wear prediction during machining where wear rates vary between components

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10

Jaffery, Husain Imran Syed. "Improving the Integrity of Wear Maps and Extending their use to the Machining of Titanium Alloys." Thesis, University of Manchester, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518809.

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11

Aceves, Maureen. "Subsurface deformation micromechanisms induced during machining of titanium alloys at low temperatures, and a novel testing methodology to examine their machining behaviour." Thesis, University of Sheffield, 2019. http://etheses.whiterose.ac.uk/23100/.

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The aerospace industry's drive towards higher productivity has led manufacturers to strive for higher surface speeds in metal cutting. Machining of titanium alloys leads to high temperatures attributed to their low thermal properties, resulting in high tool wear rates. To counter this, large amounts of coolants are used. These contain toxic chemicals, which are harmful to both people and the environment. To reduce these hazards, near-dry strategies such as cryogenic cooling and minimum quantity lubrication (MQL) are investigated in this thesis. A fundamental knowledge gap in the literature was

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12

Hatt, Oliver. "On the mechanism of tool crater wear in titanium alloy machining." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/17231/.

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Today the aerospace industry spends hundreds of millions of dollars on the machining of titanium alloy components. And with increasing aircraft orders, there is pressure to machine at higher production rates and develop more machinable alloys (e.g. TIMETAL® 54M, TMETAL® 407) without compromising titanium’s excellent mechanical properties. Increasing the tool life by a factor of minutes can have a dramatic effect on machining cost. Unlike steels, the same tool grade is used for all titanium alloy types from alpha to beta rich, with the latter being more difficult to machine. Diffusion dominated

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13

Modgil, Aditya. "Effects of high speed machining on surface topography of titanium alloy (Ti6Al4V)." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0002846.

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14

Perončík, Martin. "Obrábění těžkoobrobitelných materiálů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229217.

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Diploma thesis is specialized to solving of problems machining of diffi-cult machinable materials. There is carried out the analysis of difficult machinable materials in term of chemical composition, physical and mechanical properties. In the following it deals with analysis of machining, specification of geometry, material of cutting tools and cutting conditions.

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15

Filipčík, Jiří. "Optimalizace výroby dílu pro letecký průmysl." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228816.

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This thesis deals with optimization of production of "Hold-down hinge hook" component, developed from difficult-to-cut titanium alloy Ti-6Al-4V. This work is focused on the material properties of the component, current research and optimization in titanium machinability sphere. Further it contains a part dedicated to the latest trends in development of cutting tools for machining of titanium alloys. This knowledge is furthermore used for the component production optimization in Frencken Brno s.r.o. company. This project continues with analysis of the component‘s current production technology a

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16

Baharudin, B. T. Hang Tuah. "Experimental investigation of high speed micro machining of H13 tool steel and titanium alloy 6-4." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494133.

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High-accuracy miniaturized components are increasingly in demand for various industries such as aerospace, biomedical, electronics, environmental, communication and automotive, and this coupled with new developments of High Speed Machining (HSM) has led to the emergence of a strong and viable technology in High Speed Micro Machining. This technology is very important in bridging the macro-domain and the nano- and micro- domains for making functional miniaturized components. High speed Micro Machining is a specific technology where high spindle speeds, high performances cutting tools and high a

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17

Oosthuizen, G. A. "Innovative cutting materials for finish shoulder milling Ti-6A1-4V aero-engine alloys." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1561.

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Thesis (MScEng (Industrial Engineering))--University of Stellenbosch, 2009.<br>The titanium alloys have found wide application in the aerospace, biomedical and automotive industries. Soaring fuel prices and environmental concerns are the fundamental drivers that intensify the demand situation for titanium. From a machining viewpoint, one of the challenges companies face, is achieving high material removal rates while maintaining the form and function of the part. The ultimate aim for a machining business remains to make parts quickly. Conventional cutting speeds range from 30 to 100 m/min in t

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18

Antonialli, Armando Italo Sette. "Uma contribuição ao fresamento frontal da liga de titanio Ti-6Al-4V." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264153.

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Orientador: Anselmo Eduardo Diniz<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-12T21:04:08Z (GMT). No. of bitstreams: 1 Antonialli_ArmandoItaloSette_M.pdf: 4713382 bytes, checksum: def6e55af0d1c4dc5c508bbe6440464c (MD5) Previous issue date: 2009<br>Resumo: As ligas de titânio apresentam baixa usinabilidade devido à reduzida condutividade térmica, à manutenção de suas propriedades mecânicas em altas temperaturas, à elevada afinidade química com os materiais de ferramentas e ao baixo módulo de elasticidad

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19

Pires, Bruno Jorge. "Estudo das forças, vibrações e desgaste das ferramentas no fresamento da liga de titânio Ti-6A1-4V." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264148.

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Orientador: Anselmo Eduardo Diniz<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-17T14:51:33Z (GMT). No. of bitstreams: 1 Pires_BrunoJorge_M.pdf: 4048093 bytes, checksum: 91ac8c1d8bef0f7903675a183371c8bc (MD5) Previous issue date: 2011<br>Resumo: Ligas de titânio já apresentam um papel de grande importância na indústria aeroespacial, petroquímica e de biomateriais. A combinação de alta resistência mecânica, baixa densidade, resistência à corrosão, biocompatibilidade, boa tolerância tecidual e manutenção

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20

Kakavand, Pegah. "A Comparative Study on Micro Electro-Discharge Machining of Titanium Alloy (TI-6AL-4V) and Shape Memory Alloy (NI-TI)." TopSCHOLAR®, 2015. http://digitalcommons.wku.edu/theses/1466.

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The purpose of this research was to investigate the surface modifications that take place during the machining of NiTi SMA and Ti-6Al-4V with micro-EDM. This was done by creating an array of blind holes and micro-patterns on both work-pieces. To analyze the machined surface and investigate the results, scanning electron microscope (SEM), energy dispersive X- ray spectroscopy (EDS) and X-ray diffraction (XRD) techniques were employed. In addition, the effects of various operating parameters on the machining performance was studied to identify the optimum parameters for micro-EDM of NiTi SMA and

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21

Čejka, Libor. "Produktivní obrábění titanových slitin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230589.

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The aim of the thesis is to analyze the production costs and optimize cutting conditions for high-feed face milling of titanium alloy Ti6Al4V. In the experiment were changed cutting conditions, such as cutting speed vc and feed speed vf. During the experiment were checked cutting forces by dynamometr. Furthermore, surface roughness and tool wear is observed.

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22

Maurotto, Agostino. "Improvements in ultrasonically assisted turning of TI 15V3Al3Cr3Sn." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12327.

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Titanium alloys have outstanding mechanical properties such as high hardness, a good strength-to-weight ratio and high corrosion resistance. However, their low thermal conductivity and high chemical affinity to tool materials severely impairs their machinability with conventional techniques. Conventional machining of Ti-based alloys is typically characterized by low depth of cuts and relatively low feed rates, thus adversely affecting the material removal rates (MRR) during the machining process. Ultrasonically assisted turning (UAT) is an advanced machining technique, in which ultrasonic vibr

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23

Khatri, Ashutosh Mahesh. "INVESTIGATING TOOL WEAR MECHANISM AND MICROSTRUCTURALCHANGES FOR CONVENTIONAL AND SUSTAINABLE MACHINING OFTITANIUM ALLOY." Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1533287855502478.

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24

Pepin, Faustin. "Obrobitelnost kompresních kol z titanových slitin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230048.

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Nespornou vyhodou počítačem podporované výroby (CAM) je výrazná časová úspora při přípravě obráběcího programu. Asociativita je jedním z řešení, její místo v rámci přípravy výrobku se nachází mezi hlavní konstrukcí a technologií podniku. Pro studium asociativity byl použity CAD/CAM modely kompresoru, který díky své komplexní geomtrii posloužil jaky dobrý příklad. Tato práce se podtrhuje omezené možnosti asociativity, především pokud jde o realizaci obráběcího programu pro součást tvořenou více prvky. Dále v této studii budou prezentovány jisté možnosti zlepšení procesu. Studie asociativity v t

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25

Alavi, Farshid. "Optimization of Process Parameters in Micro Electrical Discharge Machining (EDM) of TI-6AL-4V Alloy." TopSCHOLAR®, 2016. http://digitalcommons.wku.edu/theses/1568.

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Ti-6Al-4V has a wide range of applications such as in the automotive and aerospace industries. Nevertheless, titanium alloys are very difficult to machine by conventional methods. Micro-EDM is a non-conventional machining method that uses the thermal effect of precisely controlled sparks. Manufacturers are looking for the methods and optimal settings to increase the productivity of micro-EDM in terms of lessening machining time and tool wear. Moreover, surface integrity of the machined area is crucial for some products such as biomedical implants. The objective of this study was to investigate

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26

Mahbub, Md Rashef. "INVESTIGATING THE EFFECT OF MECHANICAL PROPERTIES AND SUB-SURFACE MICROSTRUCTURE OF TITANIUM ALLOY ON CELL ATTACHMENT MACHINED BY ELECTRO-DISCHARGE MACHINING." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1564671363905827.

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27

Caudill, James R. "ENHANCED SURFACE INTEGRITY WITH THERMALLY STABLE RESIDUAL STRESS FIELDS AND NANOSTRUCTURES IN CRYOGENIC PROCESSING OF TITANIUM ALLOY TI-6AL-4V." UKnowledge, 2019. https://uknowledge.uky.edu/me_etds/134.

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Burnishing is a chipless finishing process used to improve surface integrity by severe plastic deformation (SPD) of surface asperities. As surface integrity in large measure defines the functional performance and fatigue life of aerospace alloys, burnishing is thus a means of increasing the fatigue life of critical components, such as turbine and compressor blades in gas turbine engines. Therefore, the primary objective of this dissertation is to characterize the burnishing-induced surface integrity of Ti-6Al-4V alloy in terms of the implemented processing parameters. As the impact of cooling

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28

Trubačová, Pavlína. "Pokročilá výroba individuálních ortopedických implantátů technologií selektivního tavení laserem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-256549.

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This work describes advanced fabrication of custom orthopaedic implants using unconventional additive manufacturing technology - Selective Laser Melting (SLM). There was a main focus on custom knee replacement and certainly on its femoral component. The study investigated three general issues within the domain of the usage of additive manufacturing technology in medical application. First, there was an evaluation of process parameters influences of SLM fabrication method on surface and mechanical properties of titanium Ti6Al4V ELI specimens. This material was used because of its biocompatibili

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29

JESUS, EDILSON R. B. de. "Ferramentas de usinagem em aco rapido AISI M2 obtido por conformacao por 'Spray'." reponame:Repositório Institucional do IPEN, 2004. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11244.

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Made available in DSpace on 2014-10-09T12:49:52Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:03:11Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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30

Dorlin, Théo. "Développement d’un modèle généralisé d’efforts de coupe pour l’usinage de l'alliage de titane Ti6Al4V. Application aux techniques de tournage et fraisage." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0044/document.

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Dans l’optique de maîtriser l’industrialisation des pièces complexes, les efforts de coupe sont une source riche d’informations. Bien que la prédiction des efforts de coupe soit un sujet largement traité par la communauté scientifique, quelques verrous subsistent. Les travaux de cette étude visent à enrichir les modèles existants sous deux principaux aspects : une étude approfondie de l’influence des conditions de contact en dépouille associées à la géométrie de pièce et l’effet de l’usure de l’outil sur l’évolution des efforts de coupe au cours du temps. Pour ce faire, plusieurs expérimentati

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31

Delolme, Laurent. "Optimisation multicritères de gammes d'usinages." Thesis, Université Clermont Auvergne‎ (2017-2020), 2017. http://www.theses.fr/2017CLFAC019.

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L’objectif de ces travaux est de développer une méthodologie de génération automatique de gammes d’usinage optimises et innovantes qui permettent aux sous-traitants aéronautiques de faire face aux problématiques de productivité et de compétitivité actuelles. Dans un premier temps, un état de l’art sur les systèmes existants de génération de gammes est présenté et permet d’introduire les limites des systèmes actuels. Une méthodologie en quatre étapes est ensuite proposée, permettant à l’utilisateur d’obtenir des gammes d’usinage optimisées respectant son savoir-faire et son expérience et introd

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32

Slabý, Ondřej. "Produktivní obrábění titanových slitin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230126.

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This diploma thesis is focused on a productive machining of titanium alloys. At the beginning it deals about titanium and its alloys. It describes chip generation mechanism, tool blunting and surface quality. Further it contains modern strategies of efficient titanium alloys machining. Then it analyzes contemporary manufacturing technology of hinge made of titanium alloy Ti-6Al-4V in Frentech Aerospace s.r.o. company, and at the end finds possibility of savings by inovation of roughing process.

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33

Odelros, Stina. "Tool wear in titanium machining." Thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-176944.

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The present work was performed at AB Sandvik Coromant as a part in improving the knowledge and understanding about wear of uncoated WC/Co cutting tools during turning of titanium alloy Ti-6Al-4V. When machining titanium alloys, or any other material, wear of the cutting tools has a huge impact on the ability to shape the material as well as the manufacturing cost of the finished product. Due to the low thermal conductivity of titanium, high cutting temperatures will occur in narrow regions near the cutting edge during machining. This will result in high reaction and diffusion rates, resulting

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34

Sobiyi, Kehinde Kolawole. "Machining of powder metal titanium." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6852.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2011.<br>ENGLISH ABSTRACT: The purpose of this study is to investigate the machinability of commercially pure (CP) titanium, manufactured using the press-and-sinter PM process. To this end, CP titanium powder (-200 mesh) was compacted and sintered in vacuum (10-4 torr) for two hours at 1200°C. Small cylindrical samples were compacted at pressures varying from 350 to 600 MPa in order to determine the compressibility of the powder. Following these tests, four larger stepped-cylinder samples were compacted

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35

Ingelbrecht, Christopher Douglas. "Superplastic deformation of titanium alloys." Thesis, University of Surrey, 1985. http://epubs.surrey.ac.uk/800/.

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36

Mahmoud, El-Amin A. "Machining with titanium nitride-coated metal tools." Thesis, Aston University, 1988. http://publications.aston.ac.uk/11912/.

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37

Blank, Jonathan P. "Effect of boron additions on microstructure & mechanical properties of titanium alloys produced by the Armstrong process." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1198718818.

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38

Barnett-Ritcey, Dwayne D. Elbestawi Mohamed Abdel Aziz. "High-speed milling of titanium and gamma-titanium aluminide: An experimental investigation /." *McMaster only, 2004.

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39

Henderson, Alistair. "Abrasive flow machining of nickel based alloys." Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422738.

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40

Barker, Samuel Paul. "Kinetically-Controlled Nitridation of Titanium Alloys." Cleveland, Ohio : Case Western Reserve University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1270136080.

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

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41

Hoffmann, Ilona. "MAGNESIUM-TITANIUM ALLOYS FOR BIOMEDICAL APPLICATIONS." UKnowledge, 2014. http://uknowledge.uky.edu/cme_etds/36.

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Magnesium has been identified as a promising biodegradable implant material because it does not cause systemic toxicity and can reduce stress shielding. However, it corrodes too quickly in the body. Titanium, which is already used ubiquitously for implants, was chosen as the alloying element because of its proven biocompatibility and corrosion resistance in physiological environments. Thus, alloying magnesium with titanium is expected to improve the corrosion resistance of magnesium. Mg-Ti alloys with a titanium content ranging from 5 to 35 at.-% were successfully synthesized by mechanical all

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42

Bassir, K. "The ultrasonic examination of titanium alloys." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329642.

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Granville, R. K. "The ultrasonic behaviour of titanium alloys." Thesis, Bucks New University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373580.

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Prasad, Rajesh. "Metastable phases in chromium-titanium alloys." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386323.

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Bennett, Joe Mancha. "Strengthening of metastable beta titanium alloys." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/284557.

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Using current technology, it is now possible to probe material at atomic length scales, increasing our fundamental understanding of material behavior and properties. Metastable β titanium alloys are a subset of titanium alloys with huge potential for the aerospace sector. However, they exhibit atomic transformations which, even after 60 years of research, are still disputed. For example, these alloys are strengthened using the ω phase, but the mechanism by which this phase forms and its stability are still in question. The aim of this PhD project was to investigate the strengthening of metasta

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46

Camagu, Sigqibo Templeton. "Surface modification of titanium-based alloys." Master's thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/4967.

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Includes bibliographical references (leaves 97-101)<br>Two routes of Oxygen Diffusion Hardening (ODH) have been investigated on two alloys of titanium, Ti-6AI-4V and Ti-6AI-7Nb (by weight). The first route involves a controlled atmosphere where argon saturated with water was used to transport water into the test pieces at elevated temperatures. The controlled atmosphere would encourage the generation of mono-atomic oxygen through the dissociation of water vapour, and therefore change the kinetics of physical absorption and diffusion of oxygen into titanium. The second route of ODH investigated

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47

Arditti, David Louis. "The hydrogen embrittlement of titanium alloys." Thesis, Imperial College London, 1994. http://hdl.handle.net/10044/1/11438.

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Chun, Chang Hwan. "Transformation processes and microstructural instability in a beta titanium alloy /." Thesis, Connect to this title online; UW restricted, 1988. http://hdl.handle.net/1773/10578.

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Hill, Davion M. "Microstructure and mechanical properties of titanium alloys reinforced with titanium boride." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1150402807.

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Janzeer, Yasmeen. "Surface modification of titanium and titanium alloys to enhance bone healing." Thesis, King's College London (University of London), 2013. https://kclpure.kcl.ac.uk/portal/en/theses/surface-modification-of-titanium-and-titanium-alloys-to-enhance-bone-healing(04574a0c-b593-47ef-a002-608cbe67a04b).html.

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Titanium and Its alloys have been used for many years as the material of choice for fabrication of dental, orthopaedic and maxillofacial implants, due to their excellent mechanical properties, biocompatibility, and the ability to osseointegrate with the surrounding bone. In order to improve the bioactivity and osseointegration of titanium implants, especially in compromised bone, surface modification of the implant surface and surface coatings have been introduced. There are different kinds of surface modification, such as, grinding, plasma spraying, sputter coatings, and alkaline treatment. M

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