Takashi Maeshima1,, Satoshi Ushimaru1,\footnotemark, Kiyoshi Yamauchi2 and Minoru Nishida3
1Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555
The effects of Sn content and aging conditions on superelasticity in Ti-Mo-Sn alloys were investigated. Martensitic transformation temperature decreased with an increasing of Sn content. A large superelastic strain of 3.0% was obtained in a solution-treated Ti-5 mol%Mo-5 mol%Sn alloy in the tensile test. The superelasticity in the Ti-5 mol%Mo-5 mol%Sn at room temperature was improved by aging at 873 K for short periods between 180 and 420 s. A specimen aged at 873 K for 300 s exhibited superelasticity with a recovery strain of 3.5% in the tensile test. A recovery strain of 3.0% was consistently achieved in cyclic tensile deformations.
β-titanium alloy, titanium-molybdenum-tin, tin content, heat treatment, superelasticity, martensitic transformation, smart biomaterial
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