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

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2020,（1）
• 页码范围: 79-83
• 页数: 5页
• 语种: 英文

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.