Hot deformation behavior in plane strain compression and its mechanism of TC21G titanium alloy

被引：1
|
作者：
Zhang X.-Y. [1 ,2 ]
Jia W.-J. [2 ]
Mao X.-N. [2 ]
Yin Y.-F. [2 ]
机构：
[1] School of Materials Science and Engineering, Northeastern University, Shenyang
[2] Titanium Alloy Research Institute, Northwest Institute for Nonferrous Metal Research, Xi'an
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2021年 / 31卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Dynamic recrystallization; Plane strain compression; Strain hardening exponent; TC21G titanium alloy;
D O I：
10.11817/j.ysxb.1004.0609.2021-37628
中图分类号：
学科分类号：
摘要：
The hot deformation behavior in plane strain compression of the TC21G titanium alloy was investigated in the deformation temperatures ranging from 870℃ to 940℃, the strain rates ranging from 0.1 s-1 to 1 s-1. The microstructures evolution was also analyzed. Meanwhile, the effect of processing parameters on the strain hardening exponent n was analyzed. The results show that, under the condition of a certain strain rate, the flow stress of alloy decreases with the increase of the deformation temperature due to the increase of β phase content. However, in the condition of a certain temperature, the flow stress of alloy increases with the increase of the strain rate, because the velocity of mobile dislocations increases. During deforming in the α+β field, with the increase of the deformation temperature or strain, and the decrease of the strain rate, the globularization degree of the lamellar α phase increases. Based on the microstructure examination, the variation of n values is found to depend on the adiabatic heating effect, dynamic recrystallization (DRX) and dynamic recovery (DRV) of β phase. © 2021, Science Press. All right reserved.
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页码：49 / 56
页数：7
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