Achieving high-temperature strength and plasticity in near-α Ti-7Al-3Zr-2V alloy using cluster formula design

• DOI: 10.1016/j.jmrt.2022.03.158
• Publication Date: 2022-03-31T11:59:16Z
• Authors: Zhihao Zhu; Tianyu Liu; Chuang Dong; Dandan Dong; Shuang Zhang; Qing Wang
• Keywords: Elongation; Volume fraction; Titanium alloy

We here report a Ti-7Al-3Zr-2V alloy, designed following cluster formula approach and prepared by laser additive manufacturing, whose mechanical performance is superior to commonly used Ti-6Al-4V alloy both at as-deposited state 600 °C. Its composition α-{[Al-Ti12](AlTi2)}15+β-{[Al-Ti12Zr2](V3)}2 features an enhanced α unit proportion of 15/17 (with respect 12/17 Ti-6Al-4V) stabilized β-Ti via Zr V alloying. This shows good laser-additive-manufacturing processibility. At the state, its ultimate tensile strength 1060 MPa, yield 976 particularly elongation 14.9% are all better than those Ti-6Al-4V. °C, 545 497 39.7% far exceed After tests plate size volume fraction remain basically unchanged, in sharp contrast