Dependence of stress-induced omega transition and mechanical twinning on phase stability in metastable β Ti-V alloys

被引：56
作者：
Wang, X. L. [1 ]
Li, L. [1 ]
Mei, W. [1 ]
Wang, W. L. [1 ]
Sun, J. [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Shanghai Key Lab Adv Hightemp Mat & Precis Formin, Shanghai 200240, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2015年 / 107卷
基金：
中国国家自然科学基金;
关键词：
Stress-induced phase transformation; Deformation twinning; Mechanical property; beta titanium alloy; TITANIUM-ALLOYS; DEFORMATION; TRANSFORMATION; OXYGEN;
D O I：
10.1016/j.matchar.2015.06.038
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Tensile properties and deformation microstructures of a series of binary beta Ti-16-22V alloys have been investigated. The results show that the plastic deformation mode changes from the plate-like stress-induced omega phase transformation with a special habit plane of {-5052}(omega)//{3 - 3 - 2}(beta) to {332)< 113 > type deformation twinning with increasing the content of vanadium in the beta Ti-16-22 wt.% V alloys. The plate-like stress-induced to phase has a special orientation relationship with the beta phase matrix, i.e., [110]beta//[- 12 - 10](omega), (3 - 3 - 2)(beta)//(-5052)(omega) and (-55 -4)(beta)//(30 - 31)omega. The alloys plastically deformed by stress-induced omega phase transformation exhibit relatively higher yield strength than those deformed via {332}< 113 > type deformation twinning. It can be concluded that the stability of beta phase plays a significant role in plastic deformation mode, i.e., stress-induced to phase transformation or {332}< 113 > type deformation twinning, which governs the mechanical property of the beta Ti-16-22 wt.% V alloys. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码：149 / 155
页数：7
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