Preparation of Ti–Nb–Ta–Zr alloys for load-bearing biomedical applications

Bo-Qiong Li¹，Chun-Lin Li¹，Zhen-Xia Wang²，Xing Lu³

1. Department of Mechanical Engineering, Jinzhong University2. College of Material Science and Engineering, Taiyuan University of Technology3. Liaoning Key Materials Laboratory for Railway, School of Materials Science and Engineering, Dalian Jiaotong University

摘 要：Ti–Nb–Ta–Zr alloys for biomedical applications were successfully fabricated by arc melting（AM） and diffusion bonding.The microstructure, mechanical properties and electrochemistry behavior in a simulated body fluid（SBF） were studied.It shows that melted Ti–Nb–Ta–Zr alloy mainly contains β phase although there are a few Ti-rich phases and micropores, the number of which is lower than that in sintered sample with a few Ti-rich and Ta-rich phases.The melted alloys present higher strength（1224 MPa）, Young’s modulus（15.3 GPa） and corrosion potential（-0.34 V） in SBF, while total recovery strain ratio（67.5%） and pseudoelastic strain ratio（8.4%） of sintered Ti–Nb–Ta–Zr alloy keep higher value than 35.7%and 5.0% for melted Ti–Nb–Ta–Zr.The reasons were discussed based on the microstructure of the Ti–Nb–Ta–Zr alloys.

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