Thermal deformation behavior of TC21 titanium alloy

被引：0
|
作者：
Xie X. [1 ]
Sun Q.-J. [1 ]
Peng J.-H. [1 ]
Zhou J.-W. [1 ]
机构：
[1] School of Aeronautical Manufacturing Engineering, Nanchang Hongkong University, Nanchang
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2020年 / 30卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Constitutive equation; Deformation temperature; Processing map; Strain rate; TC21 titanium alloy;
D O I：
10.11817/j.ysxb.1004.0609.2020-36496
中图分类号：
学科分类号：
摘要：
The high temperature hot compression deformation tests of TC21 titanium alloy were carried out by Gleeble-3500 thermal simulation machine. The test deformation temperature was in the range of 890-990℃ and the strain rate was in the range of 0.01-10 s-1. The microstructure evolution of the alloy during high temperature deformation was investigated by analyzing the stress-strain curves and the microstructure obtained under different hot deformation conditions. The results show that TC21 titanium alloy is very sensitive to deformation temperature and strain rate, and the flow stress increases with increase of strain rate and decrease of temperature. With increasing deformation temperature and decreasing strain rate, the dynamic recovery effect in the microstructure is enhanced and the number of dynamic recrystallized grains in the microstructure decreases. In addition, the high temperature constitutive equation of TC21 titanium alloy was established by the regression method. The experimental results show that the constitutive model is in good agreement with the experimental results. The processing map on the basis of Prasad instability criterion was established, which provided a theoretical basis for planning the forging process of TC21 titanium alloy. © 2020, Science Press. All right reserved.
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页码：2048 / 2058
页数：10
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