Desempenho em fadiga e corrosão-fadiga da liga Ti-35Nb-2,5Sn laminada a quente aplicada como biomaterial

• Ano de defesa: 2013
• Autor(a) principal: Andrade, Carlos Eduardo Celestino de
• Orientador(a): Griza, Sandro
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Programa de Pós-Graduação: Pós-Graduação em Ciência e Engenharia de Materiais
• Palavras-chave em Português: Materiais; Ligas de titânio; Materiais - Fadiga; Metais - Fadiga; Materiais - Deterioração; Metais - Corrosão; Ligas de titânio - Corrosão; Corrosão-fadiga; Tratamento termomecânico
• Palavras-chave em Inglês: Materials; Metals; Titanium alloys
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
• Link de acesso: https://ri.ufs.br/handle/riufs/3494

Metallic materials have considerable importance in biomedical tissue reconstruction structural failed. Currently, the production of new alloys, titanium has been encouraged for biomedical use so as to reduce limitations and elastic modulus of alloy marketed cytotoxicity, in particular Ti-6Al-4V. Alloys Ti-Nb-Sn are an alternative for this purpose. In the current study, alloy Ti-35Nb-2,5SN were obtained by melting the arc, solubilized at 1000 ° C for 12 hours, hot-rolled with 40% reduction in water and cooled. The content of nitrogen and oxygen was verified by melting in an atmosphere of inert gas. The microstructures were characterized by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction. The characteristics in fatigue and corrosion - fatigue alloy were determined according to the guidelines noted in ASTM E466. Specimens were machined and fatigue SN curves obtained in air and in an environment with 0.9% NaCl. The micromechanics of fracture were analyzed by scanning electron microscope (SEM). The results were compared with published data for beta stabilized alloys and discussed the potential application of new alloys.