| Abstract Scope |
Electroplastic phenomenon has been demonstrated by that the elongation increases remarkably during deformation under electric current without significant temperature rise due to Joule heating. In this presentation, the origin of electroplasticity was elucidated based on numerical and experimental approaches. Ab-initio calculations show that a charge imbalance near defects weakens drastically atomic bonding. As a fundamental approach of electroplasticity, we investigated the effect of electric current density on recrystallization kinetics of ultra-low carbon steel through the microstructure characterization and mechanical property analysis. The dependence of the athermal effect on the current density during recrystallization could be quantified by introducing effective activation energy and effective temperature. As one of the challenging applications of electroplasticity, in addition, we utilized sub-second electric pulsing, which can enhance the kinetics of microstructural change to infinitely reset the damaged microstructure as a non-autonomous self-healing method. In addition, various application examples will be introduced in this presentation. |