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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

Frequency and mean stress effects in high cycle fatigue of Ti-6A1-4V

Morrissey, Ryan J. 12 1900 (has links)
No description available.
52

Shock-consolidation and reaction synthesis of NiTi intermetallic

Xu, Xiao 12 1900 (has links)
No description available.
53

Shock-activated reaction synthesis and high pressure response of Ti-based ternary carbide and nitride ceramics

Jordan, Jennifer Lynn 05 1900 (has links)
No description available.
54

Effects of passivation treatments on corrosion behavior and passive film composition for 316L stainless steel and alloy MP 35N

Olander, Andrew F. 05 1900 (has links)
No description available.
55

The fatigue crack growth behavior of Ti-24A1-11Nb as a function of temperature and load ratio

Bernard, Richard Joseph 05 1900 (has links)
No description available.
56

Evaluation of preventative solutions for fretting fatigue damage of Ti-6242 in aircraft engines /

Dyer, Jason Paul, January 1900 (has links)
Thesis (M. App. Sc.)--Carleton University, 2003. / Includes bibliographical references (p. 68-76). Also available in electronic format on the Internet.
57

Durability of nitinol for structural applications

McCarty, David, Hughes, Mary Leigh, January 2006 (has links) (PDF)
Thesis(M.S.)--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references (p.113-116).
58

Kinetics of TiB formation

Walther, George Charles, January 1976 (has links)
Thesis--University of Florida. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 235-244).
59

Changes in the mechanical behavior of Nitinol following variations of heat treatment duration and temperature

Khalil, Heidi F. January 2009 (has links)
Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2010. / Committee Chair: Gall, Kenneth; Committee Member: McDowell, David; Committee Member: Thadhani, Naresh. Part of the SMARTech Electronic Thesis and Dissertation Collection.
60

Caracterização da superfície da liga Ti-30Ta após crescimento de nanotubos

Capellato, Patricia [UNESP] 23 February 2012 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:32:50Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-02-23Bitstream added on 2014-06-13T20:27:52Z : No. of bitstreams: 1 capellato_p_dr_guara.pdf: 1337923 bytes, checksum: 3edc5b93305051c3258b073892d9965d (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Titânio CP e a liga Ti6Al4V são amplamente empregados na fabricação de componentes para aplicações biomédicas. No entanto, estes materiais podem causar problemas de saúde em função da liberação de íons metálicos citotóxicos e reabsorção do osso adjacente devido a grande diferença entre o modulo de elasticidade do material e osso. Esses fatores têm levado ao desenvolvimento de novas ligas de titânio e também de novas técnicas de modificação de superfície. Amostras da liga experimental Ti-30Ta na forma de discos com 13 mm de diâmetro e 3 mm de espessura foram empregadas nesse estudo. O processo de anodização foi realizado sob tensão de 15V, 25V e 35V e tempos de 20 e 40 min em eletrólito formado por HF/H2SO4 com adição de dimetil sulfóxido (DMSO). A calcinação das amostras foi realizada a 530ºC durante 3 h. As superfícies foram avaliadas empregando-se MEV-FEG, EDS e a molhabilidade avaliada com ângulo de contato. Todas as condições avaliadas apresentam superfície hidrofílica. Nanotubos de Ti-30Ta foram obtidos na condição 35V-40 mim apresentado 100 nm de comprimento e 80-100 nm de diâmetro. A biocompatibilidade da liga Ti-30Ta com nanotubos foi avaliada após 24 e 72 horas de cultura celular com fibroblastos dérmicos humanos (HDF, neonatal). A adesão e proliferação celular, viabilidade, organização do citoesqueleto e morfologia celular foram investigadas por meio de imagens de microscópio de fluorescência, ensaios bioquímicos e MEV-FEG. Análise celular demonstrou aumento significativo na adesão e proliferação celular, viavilidade, alongamento e produção de matriz extracelular de fibroblastos na superfície da liga Ti-30Ta com nanotubos após 72 horas de cultura celular... / In the last years, titanium and theirs alloys have been used in dental applications due their excellent properties such as corrosion resistance and biocompatibility. However, these materials are considered bioinerts and due to your poor physiological integration that may result in fibrous encapsulation and further biomaterial rejection. Ti-30Ta alloys, for use in biomedical applications are the subject of this research. The aim is to discover optimal alloy proportions for tissue-like mechanical properties and improved biocompatibility. Of the alloys tested, 30% Ta with Ti exhibits favorable properties including a low elastic modulus, improved strain-resistance and increased elongation to failure. Recent studies have identified strong correlations between anodized metals and the production of highly biomimetic nanoscale topographies. These surfaces provide an interface of enhanced biocompatibility that exhibits a high degree of oxidation and surface energy. In this study, the mechanical substrate and topographical surface properties of anodized Ti-30Ta alloy were investigated using scanning electron microscopy (SEM), energydispersive spectroscopy (EDS) and contact angle measurement. The anodization process was performed in an electrolyte solution containing HF (48%) and H2SO4 (98%) in the volumetric ratios 1:9 with the addition of 5% dimethyl sulfóxido (DMSO) at 15V, 25V and 35V for 20 and 40 min, producing a nanotube architecture when anodized at 35V for 40 min. Human dermal fibroblasts (HDF, neonatal) were utilized to evaluate the biocompatibility of Ti-30Ta nanotubes after 24 and 72 hours of culture. Cellular adhesion, proliferation, viability, cytoskeletal organization and morphology were investigated using fluorescence microscope imaging, biochemical assay and SEM imaging respectively... (Complete abstract click eletronic access below)

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