Improved mechanical and wear properties of Ti-35Nb-5Ta-7Zr-xSi alloys fabricated by selective electron beam melting for biomedical application

作     者：YANG Kun WANG Jian YANG Guang-yu JIA Liang 杨坤;王建;杨广宇;贾亮

作者机构：College of Materials Science and EngineeringJilin UniversityChangchun 130025China State Key Laboratory of Porous Metal Materials(Northwest Institute for Nonferrous Metal Research)Xi’an 710016China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2022年第29卷第12期

页      面：3825-3835页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project(2019zdzx-04-03) supported by the Science&Technology Specific Projects of Shaanxi Province,China Project(2021KJXX-75) supported by the Innovation Capability Support Plan of Shaanxi Province,China 

主　　题：β-type titanium alloys additive manufacturing microstructure mechanical properties wear resistance 

摘      要：As the next generation biomedical titanium alloy, β-type titanium alloys are excellent candidates for biomedical applications due to the relative low elastic modulus and the contained non-toxic elements. However, the relative low strength and unsatisfactory tribological property are undesired for load-bearing implant applications. In this study, 0-5 at% Si was added to the classic Ti-35Nb-5Ta-7Zr alloy to improve its strength and wear resistance, and the(Ti-35Nb-5Ta-7Zr)1-x-Six(x=0, 1 at% and 5 at%) alloy were fabricated by selective electron beam melting(SEBM)technology. The results indicated that Si addition significantly increases in compressive yield strength, which is mainly due to grain refinement strengthening. At the same time, the wear rate of the as-built TNTZ-5Si alloy in SBF solution was only ~30% of the Ti-6Al-4V alloy. Consequently, the TNTZ-5Si alloy showed an excellent combination of compressive yield strength, elastic modulus and wear resistance for potential load-bearing implant applications.