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The anomalous negative electric current sensitivity of a precipitation hardened Al alloy during electrically-assisted forming

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成果类型:
期刊论文
作者:
Dong, Hongrui;Li, Xiaoqiang;Li, Yong;Zhao, Shiteng;Wang, Haibo;...
作者机构:
[Dong, Hongrui; Zhao, Shiteng] School of Materials Science and Engineering, Beihang University, Beijing 100191, China
[Li, Xiaoqiang; Li, Yong; Meng, Bao] School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
[Wang, Haibo] School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100144, China
[Liu, Xiaochun] Institute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China
[Du, Kai] School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
语种:
英文
关键词:
Electrically-assisted forming;AA7075-T6;Precipitate;Constitutive model
期刊:
Journal of Materials Research and Technology
ISSN:
2238-7854
年:
2023
卷:
24
页码:
9356-9368
机构署名:
本校为其他机构
院系归属:
材料科学与工程学院
摘要:
It has been known for decades that the formability of metal sheets can be improved effectively by electrically-assisted (EA) forming. However, it remains controversial as to the detailed mechanisms and the manifestation of electrical effects can vary in different materials. In this paper, the EA flow behavior and mechanism of a precipitation hardened AA7075-T6 were studied. The term “electric current density sensitivity” (ECDS) was introduced to describe the athermal effect. The results show that Joule heating is the main influence factor, wh...

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