Constitutive equation and microstructure evolution of TiAl alloy during hot deformation

被引：2
作者：
Tian, Shiwei [1 ,2 ]
Yang, Zhenyu [1 ]
Zhang, Siyuan [1 ]
Liao, Zhiqian [2 ]
Zhang, Yongjun [1 ]
Yang, Yonggang [1 ]
Chen, Yulai [1 ]
Jiang, Haitao [1 ]
机构：
[1] Univ Sci & Technol Beijing, Natl Engn Res Ctr Adv Rolling & Intelligent Mfg, Beijing 100083, Peoples R China
[2] Luoyang Ship Mat Res Inst, Luoyang, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2023年 / 10卷 / 10期
基金：
中国国家自然科学基金;
关键词：
TiAl alloys; constitutive equation; microstructure evolution; hot deformation; BEHAVIOR; TEMPERATURE; DESIGN; PHASE;
D O I：
10.1088/2053-1591/acfc99
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The hot deformation behavior of TiAl alloy is analyzed by combining the true stress-strain curve and microstructure analysis. The results show that the flow stress of TiAl alloy presents the characteristics of work hardening-dynamic softening, it increases with the increase of strain rate and decreases with the increase of temperature. Based on the true stress-strain curves, the flow stress of TiAl alloy under different deformation conditions is predicted by hyperbolic sinusoidal formula. In addition, the effects of deformation temperature and strain rate on the microstructure evolution of TiAl alloy are revealed. In the process of hot compression deformation, dynamic recrystallization and gamma ->alpha, beta ->alpha phase transformation occurs. During tensile deformation, TiAl alloy exhibits super-plasticity, which is mainly due to grain rotation and coordinated deformation of beta phase.
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页数：10
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