Mechanical Behavior and Numerical Simulation of 7005 Aluminum Alloy Under Dynamic Impact

被引：0

作者：

Xu C. ^{[1
]}

Ye T. ^{[1
,2
]}

Tang M. ^{[3
]}

Guo P. ^{[1
]}

Tang X. ^{[1
]}

Wu Y. ^{[2
]}

Li L. ^{[1
]}

机构：

[1] State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha

[2] Automotive Parts Technology Research Institute, Hunan Institute of Technology, Hengyang

[3] College of Civil Engineering, Hunan University, Changsha

来源：

Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 02期

基金：

中国国家自然科学基金;

关键词：

7005 aluminum alloy; Adiabatic shear; Numerical simulation; Strain rate sensitivity;

D O I：

10.11896/cldb.201904020

中图分类号：

学科分类号：

摘要：

The flow stress behavior of 7005 aluminum alloy at strain rate ranging from (1-5)×103 s-1 was investigated. The results show that 7005 aluminum alloy is sensitive to strain rate. The parameters of Johnson-Cook equation were obtained thorough least square method. The ABAQUS was used to simulate the adiabatic shear of hat like specimen. The simulated stress-strain curves are in agreement with expe-riment results. The calculation of temperature field is a way to estimate the occurrence of recrystallization, when the strain rate is 15 000 s-1, compared to the initial temperature, the average temperature rise of the sample is 405℃ in the range of 120-240 μs. A large number of equiaxed grains are detected by observing the microstructure of the deformed specimens, which is a typical character of recrystallization. The deformation tempe-rature rise and dynamic recrystallization softening behavior of 7005 aluminum alloy at high strain rate will provide important guidance for its application in automobile crash structural parts. © 2019, Materials Review Magazine. All right reserved.

引用

页码：670 / 673

页数：3

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