Characterization of Hot Deformation Behavior of Ti60 Alloy by Using Processing Map

被引：0

作者：

Jia, Weiju ^{[1
]}

Zeng, Weidong ^{[1
]}

Zhou, Yigang ^{[1
]}

Liu, Jianrong ^{[2
]}

Wang, Qingjiang ^{[2
]}

机构：

[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[2] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

来源：

TI-2011: PROCEEDINGS OF THE 12TH WORLD CONFERENCE ON TITANIUM, VOL I | 2012年

基金：

中国国家自然科学基金;

关键词：

Titanium alloy; processing map; hot de formation; WORKING; TITANIUM; TI-6AL-4V;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The hot deformation behavior of Ti60 titanium alloy was investigated at the temperatures ranging from 960 degrees C to 111 degrees C and the strain rates ranging from 0. 001 s(-1) to 10 s(-1) using hot compression tests. Processing map for hot working was developed on the basis of the Dynamic Materials Model. Its stress-strain curves revealed greater flow softening in the alpha+beta field than that in the beta field. In a+beta field, flow softening was caused by break-up and globularisation of lamellar a as well as deformation heating during deformation. While in the beta field, flow softening was caused by dynamic recovery and recrystallization. The material exhibited superplasticity with a peak efficiency of 60% at 990 degrees C and 0. 001 s(-1), which was the optimum parameters for alpha+beta field working. There were two instability fields in the processing map: 960-970 degrees C at 0. 18-10 s(-1) and 1010-1110 degrees C at 0. 75-10 s(-1). These fields should be avoided due to the formation of the adiabatic shear bands during the deformation of Ti60 alloy.

引用

页码：265 / 268

页数：4

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