Transactions of Materials and Heat Treatment

Title：Current status of research on electroplasticity effect for difficult-to-deform metals under electro-thermo-mechanical coupling

Authors： Xia Qinxiang Chen Can Xiao Gangfeng Xie Zhangxiong

Unit：

KeyWords：

ClassificationCode：TG115.5；TH142

year,vol(issue):pagenumber：2021,46(9):124-131

Abstract：

By analyzing deformation characteristics of difficult-to-deform metal materials, the electroplasticity effect was proposed to realize the precise plastic forming of difficult-to-deform metals, and the current status of research on electroplasticity effect for difficult-to-deform metals was reviewed from the aspects of experimental characterization methods of electroplasticity effect, macroscopic plastic deformation behavior and microstructure evolution mechanism under the electro-thermo-mechanical coupling. Then, the experimental characterization methods for decoupling the electroplasticity effect by the current-assisted tensile/thermal tensile experiment and current-assisted tensile experiment with/without the forced cooling and their shortcomings were analyzed, and the influence laws of deformation conditions, such as current parameters and current application modes, on the macroscopic plastic deformation behavior of difficult-to-deform metals were discussed. Furthermore, the physical mechanism of the microstructure evolution that accelerated dislocation slip, promoted dynamic recrystallization and produced local Joule heat effect under the current induction was reviewed, and on this basis, the problems and development directions that need to be solved to achieve precise plastic forming of difficult-to-deform metals under the action of electro-thermo-mechanical multi-energy fields were proposed.

Funds：

国家自然科学基金资助项目（51775194）; 广州市科技计划项目（201804010135）

夏琴香（1964-），女，博士，教授 E-mail：meqxxia@scut.edu.cn 通信作者：陈灿（1994-），男，博士研究生 E-mail：mecan.chen@mail.scut.edu.cn

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