Hot Deformation Behavior and Microstructure Evolution of β-T51Z Alloy

被引：0
|
作者：
Mao, Min [1 ]
Luan, Baifeng [1 ]
Li, Feitao [1 ]
Liao, Zhongni [1 ]
Qiu, Risheng [1 ]
机构：
[1] Chongqing Key Laboratory for Light Metals, International Joint Laboratory for Light Alloys Ministry of Education, Chongqing University, Chongqing,400044, China
来源：
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2020年 / 49卷 / 04期
关键词：
The hot deformation behavior and microstructure evolution of metastable β-T51Z (51.1Zr-40.2Ti-4.5Al-4.2V) alloy at different deformation temperatures and strain rates were studied using Gleeble 3500. EBSD and TEM results show that the compressing curves in hot deformation have a typical characteristic of single-peak dynamic recrystallization; and the stress amplification increases gradually with the decrease of deformation temperatures or the increase of strain rates. Based on the peak stress; the constitutive equation of thermal deformation of alloy was established; and the activation energy Q is 159.57 kJ/mol. The deformation mechanism of alloy during hot compression is mainly related to the cross slip of dislocation. The deformation temperature and strain rate have a great influence on the deformation microstructure. Dynamic recovery exists throughout the whole hot deformation process. With the increase of deformation temperatures or the decrease of strain rates; the fractions of dynamic recrystallization increase gradually. When the deformation temperature is 800℃ and strain rate is 10 s-1; the adiabatic shear band is easily formed; and the macro/micro deformation is not uniform. © 2020; Science Press. All right reserved;
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页码：1211 / 1219
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