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

被引：22

作者：

Xina Zhang ^{[1
,2
]}

Hongwei Li ^{[1
,2
]}

Mei Zhan ^{[1
,2
]}

Zebang Zheng ^{[1
,2
]}

Jia Gao ^{[1
,2
]}

Guangda Shao ^{[1
,2
]}

机构：

[1] State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University

[2] Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment, Northwestern Polytechnical University

来源：

JournalofMaterialsScience&Technology | 2020年 / 36卷 / 01期

关键词：

Electron force; Electrical in-situ TEM; Local Joule heating effect; Dislocation structure evolution;

D O I：

暂无

中图分类号：

TG132.3 [特种热性质合金];

学科分类号：

080502 ;

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.

引用

页码：79 / 83

页数：5