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Dissertations / Theses on the topic 'Beta titanium and alpha-beta titanium'

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Published: 4 June 2021

Last updated: 11 February 2022

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1

Kar, Sujoy Kumar. "Modeling of mechanical properties in alpha/beta-titanium alloys." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1122570452.

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2

Barry, Erin Patricia. "Three-dimensional reconstruction of microstructures in [alpha] + [Beta] titanium alloys." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1211214635.

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3

Ward, A. R. "Creep and creep fracture of alpha + beta titanium alloy 6.2.4.6." Thesis, Swansea University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639344.

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High precision uniaxial constant stress creep tests were carried out at 773K for the α+β titanium alloy Ti 6.2.4.6. Repeat data at 580 MPa provided a unique opportunity to identify stochastic creep properties and to use this information to build a probabilistic creep damage assessment for this alloy. The stochastic nature of creep properties both at a single test condition (using a generalised gamma distribution) and at various test conditions (by combining this distribution with the Monkman - Grant relation) was identified. In addition, the theta prediction methodology was extended so that li

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4

Zheng, Yufeng. "Nucleation Mechanisms of Refined Alpha Microstructure in Beta Titanium Alloys." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366296464.

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5

Behera, Amit Kishan. "A Study of Mechanisms to Engineer Fine Scale Alpha Phase Precipitation in Beta Titanium Alloy, Beta 21S." Thesis, University of North Texas, 2013. https://digital.library.unt.edu/ark:/67531/metadc283838/.

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Metastable b-Ti alloys are titanium alloys with sufficient b stabilizer alloying additions such that it's possible to retain single b phase at room temperature. These alloys are of great advantage compared to a/b alloys since they are easily cold rolled, strip produced and can attain excellent mechanical properties upon age hardening. Beta 21S, a relatively new b titanium alloy in addition to these general advantages is known to possess excellent oxidation and corrosion resistance at elevated temperatures. A homogeneous distribution of fine sized a precipitates in the parent b matrix is known

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6

Bhattacharyya, Dhriti. "The development of textures and microstructures in alpha/beta titanium alloys." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1086195557.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xxii, 220 p. : ill. (some col.). Advisor: Hamish L. Fraser, Materials Science and Engineering. Includes bibliographical references (p. 217-220).

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7

Goddard, Nicholas David Richard. "Microstructural influence on fatigue in two alpha plus beta titanium alloys." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47078.

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8

Searles, Thomas K. "Microstructural characterization of the alpha / beta titanium alloy Ti-6Al-4V." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1407510262.

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9

Sinha, Vikas. "Effects of microstructure on fatigue behavior of [alpha]/[beta] Titanium Alloys /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488192119263968.

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10

Kloenne, Zachary Thomas. "Deformation Study of the Novel Alpha/Beta Titanium Alloy, Ti-407." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1606910373335718.

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11

Brandes, Matt C. "Creep, Fatigue, And Deformation Of Alpha And Alpha-Beta Titanium Alloys At Ambient Temperature." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1221848896.

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12

Lee, Eunha. "Microstructure evolution and microstructure/mechanical properties relationships in [alpha]+[beta] titanium alloys." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1092756139.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xxiii, 229 p.; also includes graphics (some col.) Includes bibliographical references (p. 224-229). Available online via OhioLINK's ETD Center

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13

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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14

Nag, Soumya. "Influence of Beta Instabilities on the Early Stages of Nucleation and Growth of Alpha in Beta Titanium Alloys." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1204570232.

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15

Stevens, Katherine Anne. "The low-cycle fatigue behavior of an alpha-two + Beta Titanium Aluminide Alloy /." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486462702466278.

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16

Joris, Oliver Pieter Johnathan. "Diffraction experiments on superelastic beta titanium alloys." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/43967.

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This thesis investigates superelasticity in metastable beta titanium alloys that contain substantial additions of Mo, principally. Superelasticity arises from a reversible transformation from the β to the orthorhombic alpha double prime (α") phase during loading, which was studied principally using in situ synchrotron X-ray diffraction at the I12 beamline at the Diamond synchrotron. Superelastic β-Ti alloys have the potential to be low weight, economical alternatives to NiTi, Gum metal and Ti-2448 for biomedical, military and aerospace applications. The cubic to orthorhombic stress induced mar

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17

Yannetta, Christopher James. "Additive Manufacturing of Metastable Beta Titanium Alloys." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1011883/.

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Additive manufacturing processes of many alloys are known to develop texture during the deposition process due to the rapid reheating and the directionality of the dissipation of heat. Titanium alloys and with respect to this study beta titanium alloys are especially susceptible to these effects. This work examines Ti-20wt%V and Ti-12wt%Mo deposited under normal additive manufacturing process parameters to examine the texture of these beta-stabilized alloys. Both microstructures contained columnar prior beta grains 1-2 mm in length beginning at the substrate with no visible equiaxed grains.

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18

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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19

Gupta, Niraj. "First Principles Study of Metastable Beta Titanium Alloys." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc804949/.

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The high temperature BCC phase (b) of titanium undergoes a martensitic transformation to HCP phase (a) upon cooling, but can be stabilized at room temperature by alloying with BCC transition metals such as Mo. There exists a metastable composition range within which the alloyed b phase separates into a + b upon equilibrium cooling but not when rapidly quenched. Compositional partitioning of the stabilizing element in as-quenched b microstructure creates nanoscale precipitates of a new simple hexagonal w phase, which considerably reduces ductility. These phase transformation reactions have been

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20

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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21

Matychak, Yaroslav, Oleh Yaskiv, Viktor Fedirko, I. Pohreljuk, and Oleh Tkachuk. "Modelling of diffusion saturation of (alpha+beta) titanium alloy by oxygen in rarefied gaseous medium." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193445.

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22

Matychak, Yaroslav, Oleh Yaskiv, Viktor Fedirko, I. Pohreljuk, and Oleh Tkachuk. "Modelling of diffusion saturation of (alpha+beta) titanium alloy by oxygen in rarefied gaseous medium." Diffusion fundamentasl 6 (2007) 25, S. 1-2, 2007. https://ul.qucosa.de/id/qucosa%3A13148.

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23

Dixit, Vikas. "Grain-Boundary Parameters Controlled Allotriomorphic Phase Transformations in Beta-Processed Titanium Alloys." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1357240292.

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24

Sevilla, Sánchez Pablo. "Functionalization of titanium surfaces with TGF-beta inhibitor peptides." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/129568.

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Esta tesis queda enmarcada en el ámbito de los biomateriales metálicos, concretamente en superficies de titanio desarrolladas para la regeneración ósea. Las aplicaciones más habituales del titanio como biomaterial son los implantes dentales y las prótesis de cadera y rodilla. Estos componentes requieren, en servicio, buena estabilidad y fijación al hueso a largo plazo. El titanio es un material idóneo para el cumplimiento de estos requisitos gracias a su alta resistencia mecánica, tenacidad, resistencia a la corrosión y, sobre todo, por su alta capacidad de osteointegración. En general, el ti

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25

Jaworski, Allan Wayne. "Effect of microstructure on the room temperature tensile and creep deformation mechanisms of alpha-beta titanium alloys." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2388.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Material Science and Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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26

Devaraj, Arun. "Phase Separation and Second Phase Precipitation in Beta Titanium Alloys." Thesis, University of North Texas, 2011. https://digital.library.unt.edu/ark:/67531/metadc67975/.

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The current understanding of the atomic scale phenomenon associated with the influence of beta phase instabilities on the evolution of microstructure in titanium alloys is limited due to their complex nature. Such beta phase instabilities include phase separation and precipitation of nano-scale omega and alpha phases in the beta matrix. The initial part of the present study focuses on omega precipitation within the beta matrix of model binary titanium molybdenum (Ti-Mo) alloys. Direct atomic scale observation of pre-transition omega-like embryos in quenched alloys, using aberration-corrected h

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27

Richardson, Mark D. "Microstructural and mechanical property development in metastable beta titanium alloys." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12663/.

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Titanium alloys represent an ever increasing proportion of the materials employed in aerostructural applications. Metastable beta alloys in particular, offer high specific strength and good corrosion resistance that allow them to compete with steels. Ti-5Al-5Mo-5V-3Cr and Ti-10V-2Fe-3Al are two such alloys used in the main landing gear of large commercial aircraft. Thermomechanical processing of metastable beta alloys is critical in obtaining the desired microstructure, which in turn governs the mechanical properties. This therefore demands a thorough understanding of the relationship between

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28

Ridland, John. "Synthetic and hydrolytic studies of titanium alkoxides and related complexes." Thesis, University of Newcastle Upon Tyne, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262881.

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29

Savage, Michael Francis. "Microstructural and mechanistic study of low temperature creep and dwell fatigue in single colony alpha/beta Titanium Alloys /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488203857249325.

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30

Cherukuri, Balakrishna. "Microstructural Stability and Thermomechanical Processing of Boron Modified Beta Titanium Alloys." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1229656783.

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31

Hastings, Philip John. "The behaviour of short fatigue cracks in a beta-processed titanium alloy." Thesis, University of Nottingham, 1989. http://eprints.nottingham.ac.uk/28458/.

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An investigation has been made into the behaviour of short fatigue cracks in the β-processed titanium alloy, Ti6Ss. The effect on the material of a number of different variables was studied, particularly microstructure, as well as stress level, specimen design and specimen size. Initiation of cracks was found to occur at similar microstructural features in smooth specimens, regardless of a-platelet morphology. Cracks initiated from slip bands across small bundles of α-platelets, despite the presence of longer, more intense slip bands across α-colonies. α-platelet morphology was found to have a

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32

Mbafor, William Fru. "Synthesis, characterisation and application of zeolite titanium (Al) beta in organic transformations." Thesis, University of Liverpool, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367145.

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33

Koduri, Santhosh K. "Application of Bayesian Neural Network Modeling to Characterize the Interrelationship between Microstructure and Mechanical Property in Alpha+Beta-Titanium Alloys." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275402649.

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34

Shariff, Tasneem. "Laser welding of a near-beta titanium alloy Ti-5 Al-5Mo-3Cr." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=96874.

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Titanium alloys are widely used in the aerospace industry due to their high specific strength and excellent corrosion resistance. However, for some large scale aircrafts, such as Airbus A380 and Boeing 787, there is a demand for even stronger Ti alloys for structural and load bearing applications. Ti-5Al-5V-5Mo-3Cr (Ti-5553) is a new metastable β titanium alloy that exhibits excellent strength characteristics, even higher than the currently used α-β titanium grades, such as the workhorse Ti-6Al-4V alloy. It is expected that Ti-5553 will gain wider applications in the future and hence its welda

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35

Peterson, Benjamin Howard. "A Combinatorial Approach to the Development of a Creep Resistant Beta Titanium Alloy." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1218488816.

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36

Broderick, Thomas Froats. "The Influence of Microstructure on the Deformation Behavior of Beta Solution Heat Treated and Aged Ti-6Al-2Sn-2Zr-2Mo-2Cr-0.18Si." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1263951781.

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37

Tungala, Vedavyas. "Exceptional Properties in Friction Stir Processed Beta Titanium Alloys and an Ultra High Strength Steel." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc984167/.

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The penchant towards development of high performance materials for light weighting engineering systems through various thermomechanical processing routes has been soaring vigorously. Friction stir processing (FSP) - a relatively new thermomechanical processing route had shown an excellent promise towards microstructural modification in many Al and Mg alloy systems. Nevertheless, the expansion of this process to high temperature materials like titanium alloys and steels is restricted by the limited availability of tool materials. Despite it challenges, the current thesis sets a tone for the usa

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38

Herbig, Michael. "3D short fatigue crack investigation in beta titanium alloys using phase and diffraction contrast tomography." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00690521.

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X-Ray Diffraction Contrast Tomography (DCT) is a recently developed, non-destructive synchrotron imaging technique which characterizes microstructure and grain orientation in polycrystalline materials in three dimensions (3D). By combining it with propagation based phase contrast tomography (PCT) it is for the first lime possible to observe in situ the 3D propagation behavior of short fatigue cracks (SFCs) within a set of fully characterized grains (orientation and shape). The combined approach, termed 3D X-ray Tomography of short cracks and Microstructure (3DXTSM), has been developed on the m

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39

Hudson, Candi Monica. "Investigation of low temperature creep deformation behavior of a metastable beta Titanium-14.8Wt%Vanadium alloy." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1729.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2004.<br>Thesis research directed by: Material Science and Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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40

Epshteyn, Albert. "Synthesis, stability, and reactivity of high-oxidation-state pentamethylcyclopentadienyl acetamidinate [beta]-Hydride- or [beta]-Methide-bearing alkyl complexes of zirconium, titanium, and tantalum." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/4249.

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

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41

Sanguinetti, Ferreira Ricardo Artur. "Influence des séquences de traitements thermiques sur les transformations structurales de l'alliage beta-cez : aspects cinétiques et morphologiques." Vandoeuvre-les-Nancy, INPL, 1994. http://www.theses.fr/1994INPL093N.

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Les séquences de transformations de phases des alliages de titane beta-cez et ti-6246 ont été étudiées au cours de différentes séquences thermiques. Plusieurs techniques ont été utilisées pour mettre en évidence les changements structuraux. Les différentes transformations se produisant au cours du chauffage et de la mise en solution dans le domaine (alpha+beta) ont été étudiées pour les trois structures initiales différentes. Nous avons montré qu'un mélange (beta métastable + oméga trempé) se décompose différemment suivant la vitesse de chauffage. Pour les vitesses les plus lentes la phase bet

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42

Ramsteiner, Ingo Benedict. "High energy x-ray study of short range order and phase transformations in titanium-vanadium." [S.l. : s.n.], 2005. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB12168122.

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43

Golozar, Mehdi. "Plasma electrolytic oxide coatings on low-modulus [beta]-type titanium alloys : applications to load-bearing orthopaedic implants." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709079.

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44

Muradás, Rodrigo Ricabone. "Mecano-síntese e caracterização de ligas de Ti-Nb-Sn." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2006. http://tede2.uepg.br/jspui/handle/prefix/1409.

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Made available in DSpace on 2017-07-21T20:42:35Z (GMT). No. of bitstreams: 1 rodrigoric.pdf: 9183178 bytes, checksum: 1d5fba078a589cbc1810eea245d1e019 (MD5) Previous issue date: 2006-10-31<br>Mechanical alloying is a powder processing technique involving cold welding, fracturing mechanisms and rewelding of powder particles in a ball mill. The present work applied this technique with the purpose of processing titanium, niobium and tin alloys, through planetary ball mill and attritor mill. The atomic percentages of these elements were varied in six differents ways. The niobium hydrate was used

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45

Aleixo, Giorgia Taiacol. "Estabilidade e metaestabilidade de fases em ligas Ti-Nb." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263173.

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Orientadores: Rubens Caram Junior, Conrado Ramos Moreira Afonso<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-06T17:14:04Z (GMT). No. of bitstreams: 1 Aleixo_GiorgiaTaiacol_M.pdf: 13698827 bytes, checksum: 10117398b384c5a1eda6c62fbfc74507 (MD5) Previous issue date: 2006<br>Resumo: Ligas de titânio formam a classe mais versátil de materiais metálicos utilizados para aplicações biomédicas. As ligas de Ti tipo ß usadas em dispositivos ortopédicos envolve, além de excelentes propriedades como baixa densidade

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46

Mavros, Nicholas C. "Advanced Manufacturing of Titanium Alloys for Biomedical Applications." Cleveland State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=csu1527771497260907.

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47

Ndali, Busongo Faustine [Verfasser]. "Influence of Heat Treatment on the Microstructure and Mechanical Properties of the Titanium Alloy Beta 21S / Faustine Ndali Busongo." Aachen : Shaker, 2005. http://d-nb.info/1186588438/34.

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48

Burton, Robert M. "Oxidant concentration effects in the hydroxylation of phenol over titanium-based zeolites Al-free Ti-Beta and TS-1." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/2366.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2006.<br>This work focuses on the effects of hydrogen peroxide concentration on the catalytic activity and product selectivity in the liquid-phase hydroxylation of phenol over titanium-substituted zeolites Al-free Ti-Beta and TS-1 in water and methanol solvents. Hydroquinone is typically the desired product, and these solvents employed have previously been shown to be of importance in controlling the selectivity of this reaction. Different volumetric quantities of an aqueous 30 wt-% peroxide solution were added to either

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49

Busongo, Faustine Ndali [Verfasser]. "Influence of Heat Treatment on the Microstructure and Mechanical Properties of the Titanium Alloy Beta 21S / Faustine Ndali Busongo." Aachen : Shaker, 2005. http://nbn-resolving.de/urn:nbn:de:101:1-2019051908540573121440.

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50

Hendrickson, Mandana. "The Role of Misfit Strain and Oxygen Content on Formation and Evolution of Omega Precipitate in Metastable Beta-titanium Alloys." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc955080/.

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β-Ti alloys are widely used in airframe and biomedical applications due to their high ductility, high hardenability, and low elastic modulus. The phase transformations in β-Ti alloys are rather complex due to formation of metastable phases during various thermo-mechanical treatments. One such critical metastable phase, the hexagonal omega (ω) phase, can form in β-Ti alloys under quenching from the high temperature β phase and/or isothermal aging at intermediate temperature. Despite a substantial amount of reported works on the ω phase, there are several critical issues related to the ω formati

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