Effect of Strain Rate on Isothermal Compression Softening Mechanism of 7065 Aluminum Alloy

被引：0
|
作者：
Zhao Y. [1 ,2 ]
Tang J. [1 ,2 ]
Zhang Y. [1 ,2 ]
Zheng X. [1 ,2 ,3 ]
Zhao H. [1 ,2 ]
机构：
[1] School of Materials Science and Engineering, Central South University, Changsha
[2] Key Laboratory of Non-ferrous Metals Materials Science and Engineering, Ministry of Education, Central South University, Changsha
[3] Guangxi Key Laboratory of Materials and Processes of Aluminum Alloys, ALG Aluminum lnc., Nanning
来源：
Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 08期
关键词：
Al-Zn-Mg-Cu alloy; constitutive equation; dynamic recovery(DRV); dynamic recrystallization(DRX); hot deformation; isothermal compression;
D O I：
10.11896/cldb.22080187
中图分类号：
学科分类号：
摘要：
The effect of strain rate on the hot deformation behavior of 7065 aluminum alloy was investigated by isothermal compression experiments and electron backscatter diffraction. The results show that as the strain rate increases from 0. 001 s-1 to 30 s-1,the dynamic recrystallization area fraction of the alloy first decreases significantly,reaching a lower level at 1 s-1,and then the change is less than 10%,and the substructure area fraction increases significantly when the strain rate is greater than 1 s-1 . The softening mechanisms in the low strain rate range (0. 001—1 s-1) are dynamic recrystallization (DRX)mechanism and dynamic recovery (DRV)mechanism,while the softening mechanism in the high strain rate range (1—30 s-1)is DRV. With the increase of strain rate,the deformation stored energy of alloy after isothermal compression deformation gradually increases. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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