Electron force-induced dislocations annihilation and regeneration of a superalloy through electrical in-situ transmission electron microscopy observations

被引：107
|
作者：
Zhang, Xin [1 ,2 ]
Li, Hongwei [1 ,2 ]
Zhan, Mei [1 ,2 ]
Zheng, Zebang [1 ,2 ]
Gao, Jia [1 ,2 ]
Shao, Guangda [1 ,2 ]
机构：
[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, Shaanxi Key Lab High Performance Precis Forming T, Xian 710072, Shaanxi, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2020年 / 36卷
基金：
中国国家自然科学基金;
关键词：
Electron force; Electrical in-situ TEM; Local Joule heating effect; Dislocation structure evolution; MECHANICAL-BEHAVIOR; ALUMINUM-ALLOY; RECRYSTALLIZATION; MG-3AL-1ZN; TENSION; METALS;
D O I：
10.1016/j.jmst.2019.08.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
What effect does electric current do on dislocation evolution of metals keeps being a confusing question to be answered and proved. To this end, the dislocation evolution of a superalloy with electric current was directly observed by electrical in-situ transmission electron microscopy in this work. Dislocations annihilation at first and then regeneration was found for the first time, which directly proves the existence of electron force during the electrically-assisted manufacturing. Dislocations regeneration would be driven by the electron force and the resistance softening by the local Joule heating effect. Resultantly, a base could be provided for future electrically-assisted research. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码：79 / 83
页数：5
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