Microstructure and properties of Ti64.51Fe26.40Zr5.86Sn2.93Y0.30 biomedical alloy fabricated by laser additive manufacturing
(1. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China;
2. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams of Ministry of Education, Dalian University of Technology, Dalian 116024, China)
2. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams of Ministry of Education, Dalian University of Technology, Dalian 116024, China)
Abstract: From the perspective of biomechanics and forming technology, Ti-Fe-Zr-Sn-Y eutectic alloy was designed using a “cluster-plus-glue-atom” model, and then the alloy was prepared by laser additive manufacturing (LAM) on pure titanium substrate. The mechanical properties of the alloy were evaluated using micro-hardness and compression tester, and the elastic modulus was measured by nanoindenter. The results show that the alloy exhibits a high hardness of HV (788±10), a high strength of 2229 MPa, a failure strain of 14%, and a low elastic modulus of 87.5 GPa. The alloy also has good tribological, chemical, forming, and biological properties. The comprehensive performances of the Ti64.51Fe26.40Zr5.86Sn2.93Y0.30 alloy are superior to those of the Ti70.5Fe29.5 eutectic alloy and commercial Ti-6Al-4V alloy. All the above-mentioned qualities make the alloy a promising candidate as LAM biomaterial.
Key words: laser additive manufacturing; composition design; biomedical titanium alloy; microstructure; property