TC21 titanium alloy;
flow stress;
hot deformation;
processing map;
HOT DEFORMATION;
MECHANISMS;
D O I:
10.4028/www.scientific.net/AMM.274.427
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
The compression test on TC21 titanium alloy was carried out in the temperature range of 860 similar to 940 degrees C and the strain rate range of 0.01 similar to 10s(-1) on Gleeble-1500D hot simulation machine. And the hot deformation behavior was studied. The processing map was calculated and analyzed according the dynamic materials model. It is found that the flow stress of TC21 decreases with the increasing of the temperature and the decreasing of the strain rate. The flow stress curves are characterized by steady state at low strain rate((epsilon)over dot <= 1 s(-1)) but discontinuous yield at high strain rate((epsilon)over dot >1 s(-1)). The processing map established at the true strain of 0.4 shows that there are three regions, instability and safe and peak region, and the efficiencies of power dissipation are 0 similar to 25%, 31%similar to 37% and 43%similar to 49% respectively. The peak region is the optimum hot working zone of TC21 titanium alloy.
机构:
Xian Univ Architecture & Technol, Xian 710055, Peoples R China
Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R ChinaXian Univ Architecture & Technol, Xian 710055, Peoples R China
Zhang Siyuan
Mao Xiaonan
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机构:
Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R ChinaXian Univ Architecture & Technol, Xian 710055, Peoples R China
Mao Xiaonan
Qi Yunlian
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机构:
Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R ChinaXian Univ Architecture & Technol, Xian 710055, Peoples R China
Qi Yunlian
Zeng Liying
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机构:
Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R ChinaXian Univ Architecture & Technol, Xian 710055, Peoples R China
机构:
Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R ChinaBeijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
Jia, Bao-Hua
Song, Wei-Dong
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机构:
Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R ChinaBeijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
Song, Wei-Dong
Tang, Hui-Ping
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机构:
Northwest Inst Nonferrous Met Res, State Key Lab Porous Met Mat, Xian, Peoples R ChinaBeijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
Tang, Hui-Ping
Ning, Jian-Guo
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机构:
Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R ChinaBeijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China