Mechanical Behaviors of Ti-29Nb-13Ta-4.6Zr-XO for Biomedical Applications Subjected to Cold Working and Various Heat Treatments

Mitsuo Niinomi; Toshikazu Akahori; Masaaki Nakai; Hiroshi Ishikawa; Michiharu Ogawa

doi:10.4028/www.scientific.net/MSF.561-565.1471

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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Mechanical Behaviors of Ti-29Nb-13Ta-4.6Zr-XO for...

Mechanical Behaviors of Ti-29Nb-13Ta-4.6Zr-XO for Biomedical Applications Subjected to Cold Working and Various Heat Treatments

Abstract:

The effect of oxygen content on aging behavior and invar characteristics of Ti-29Nb-13Ta-4.6Zr (TNTZ) were investigated. The age hardening of TNTZ aged at 573 K and 723 K is enhanced with the oxygen content. The ω phase precipitates and grows from early stage of aging in TNTZ regardless of the oxygen content when aged at 573 K. The lath-like shape α phase precipitated in TNTZ aged at 723 K increases in size with the oxygen content. The elastic modulus increases with the oxygen content and aging. The ω phase increase the elastic modulus to a greater extent than the increase due to the α phase. The tensile strength increases with the oxygen content and aging, while the elongation decreases. TNTZ with oxygen content of 0.1 mass% exhibits invar-like characteristics through severe cold working. A higher oxygen content suppresses the invar-like characteristics of TNTZ.

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Materials Science Forum (Volumes 561-565)

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1471-1476

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https://doi.org/10.4028/www.scientific.net/MSF.561-565.1471

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October 2007

Authors:

Mitsuo Niinomi, Toshikazu Akahori, Masaaki Nakai, Hiroshi Ishikawa, Michiharu Ogawa

Keywords:

Aging, Biomedical Application, Elastic Modulus, Invar-Like Characteristics, Oxygen Content, Tensile Properties, Ti-29Nb-13Ta-4.6Zr

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