Electron force-induced dislocations annihilation and regeneration of a superalloy through electrical in-situ transmission electron microscopy observations
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第1期
论文作者：Xina Zhang Hongwei Li Mei Zhan Zebang Zheng Jia Gao Guangda Shao
文章页码：79 - 83
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.
Xina Zhang1,2，Hongwei Li1,2，Mei Zhan1,2，Zebang Zheng1,2，Jia Gao1,2，Guangda Shao1,2
1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University2. Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment, Northwestern Polytechnical University
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.
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