Strain-induced α-to-β phase transformation during hot compression in Ti-5Al-5Mo-5V-1Cr-1 Fe alloy

被引：18
作者：
Li, Kai [1 ]
Yang, Ping [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2019年 / 29卷 / 02期
基金：
中国国家自然科学基金;
关键词：
titanium alloy; hot compression; phase transformation; orientation dependence; MICROSTRUCTURE EVOLUTION; DEFORMATION; WORKING; BEHAVIOR;
D O I：
10.1016/S1003-6326(19)64939-3
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The dynamic phase transformation of Ti-5Al-5Mo-5V-1Cr-1Fe alloy during hot compression below the beta transus temperature was investigated. Strain-induced alpha-to-beta transformation is observed in the samples compressed at 0-100 K below the beta transus temperature. The deformation stored energy by compression provides a significant driving force for the alpha-to-beta phase transformation. The re-distribution of the solute elements induced by defects during deformation promotes the occurrence of dynamic transformation. Orientation dependence for the alpha-to-beta phase transformation promotion is observed between {100}-orientated grains and {111}-orientated grains. Incomplete recovery in {111}-orientated grains would create a large amount of diffusion channels, which is in favor of the alpha-to-beta transformation. The effects of reduction ratio and strain rate on the dynamic phase transformation were also investigated.
引用
收藏
页码：296 / 304
页数：9
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