Excellent strength-ductility balance via controlling stress-induced a' martensite transformation of Ti422 alloy

Zhuoyue Sang,Le Wang,Jianwei Chen,Qunbo Fan,Sen Zhou,Lei Tao,Yayu Wu,Xiaoyang Peng,Zhiming Zhou,Jiahao Yao

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING（2023）

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摘要

In present work, the Ti422 (Ti-4.5Al-2.5V-2Fe) alloy with transformation-induced plasticity (TRIP) effect was designed. The combined effects of the & alpha;& PRIME; martensite and the mechanical twining leading to simultaneous enhancement of strength and ductility, which lead the alloy achieved an ultra high strain hardening rate (SHR: 8.8 GPa), as well as an excellent match between ultimate strength (UTS: 1369 MPa) and total elongation (EL: 19.1 %).

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关键词

Titanium alloys, TRIP effect, Strain hardening, Mechanical properties

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