Effect of Aging Treatment on Microstructure and Mechanical Properties of Ti27Nb2Ta3Zr β Titanium Alloy for Implant Applications

Liqiang Wang; Zhengjie Lin; Xueting Wang; Qiwei Shi; Weiqing Yin; Di Zhang; Zhongtang Liu; Weijie Lu

doi:10.2320/matertrans.M2013187

Liqiang Wang, Zhengjie Lin, Xueting Wang, Qiwei Shi, Weiqing Yin, Di Zhang, Zhongtang Liu, Weijie Lu

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Liqiang Wang
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University
Zhengjie Lin
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University
Xueting Wang
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University
Qiwei Shi
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University
Weiqing Yin
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University
Di Zhang
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University
Zhongtang Liu
Department of Orthopaedics, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University
Weijie Lu
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University

Keywords: β titanium alloy, aging, microstructure, mechanical properties

JOURNAL FREE ACCESS

2014 Volume 55 Issue 1 Pages 141-146

DOI https://doi.org/10.2320/matertrans.M2013187

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Abstract

This work aims to clarify the influence of aging temperature and time on the microstructure and mechanical properties of the Ti–Nb alloy for biomedical applications. The ingot of Ti–27Nb–2Ta–3Zr alloy was subjected to the arc melting, hot-forging and heat treatment respectively. Microstructure characterization was investigated by optical microscope (OM), X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The tensile tests showed an upward trend of the volume fraction of ω phase and α phase with the increase of aging time. When the aging temperature was higher than 673 K, the amount of ellipsoid-shaped ω phase precipitation decreased and needle-like α phase appeared, which contributed to higher tensile strength, lower Young’s modulus and better plasticity.

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