燕山大学学报2025，Vol.49Issue(6)：544-551,8.DOI:10.3969/j.issn.1007-791X.2025.06.009
纯电塑性效应下AZ31镁合金丝材流动应力特征及本构关系
Flow stress characteristics and constitutive relationship of AZ31 magnesium alloy wire under pure electroplasticity effect
摘要
Abstract
In order to eliminate the influence of electroplastic subsidiary effects on the flow stress of magnesium alloys,the mathematical model of flow stress of AZ31 magnesium alloy under the influence of pure electroplastic effects was investigated by passing high current density and low electrothermal pulse currents during the plastic deformation process of AZ31 magnesium alloy wires.Firstly,pulse currents with a frequency of 2 Hz and a pulse width of 30 μs,as well as varying current intensities,were applied to AZ31 magnesium alloy wires under uniaxial tension to determine the effects of different current densities on the flow stress of AZ31 magnesium alloy.Secondly,based on phenomenological and physical mechanisms,a constitutive equation for pure electroplastic tensile conditions was established and refined using regression fitting methods,introducing a current density parameter to derive the flow stress constitutive equation for AZ31 magnesium alloy under pure electroplastic effects.Finally,the accuracy of this flow stress model was verified through tensile testing.The results of this study will lay a theoretical foundation for the precise prediction and numerical simulation of the pure electroplastic forming process of magnesium alloys.关键词
电塑性效应/AZ31镁合金/流动应力/本构方程Key words
electroplastic effect/AZ31 magnesium alloy/flow stress/constitutive equation分类
矿业与冶金引用本文复制引用
邸鑫,李大龙,黄华贵..纯电塑性效应下AZ31镁合金丝材流动应力特征及本构关系[J].燕山大学学报,2025,49(6):544-551,8.基金项目
国家自然科学基金区域创新发展联合基金重点支持项目(U20A20230) （U20A20230）
