Superelastic properties of biomedical (Ti-Zr)-Mo-Sn alloys

Abstract

Anewclass of Ti-50Zr base biomedical superelastic alloyswas developed in this study. The (Ti-Zr)-Mo-Sn alloys exhibited a shape memory effect and superelastic property by adjusting Mo and Sn contents. The (Ti-Zr)-1.5Mo-3Sn alloy revealed the most stable superelasticity among (Ti-Zr)-(1-2)Mo-(2-4)Sn alloys. The superelastic recovery strain showed a strong dependence on heat treatment temperature after cold working in the (Ti-Zr)-1.5Mo-3Sn alloy. The superelastic recovery strain increased as the heat treatment temperature increased although the critical stress for slip decreased. The (Ti-Zr)-1.5Mo-3Sn alloy heat treated at 1073 K exhibited excellent superelastic properties with a large recovery strain as large as 7% which is due to the strong {001}β〈110〉β recrystallization texture.