The Effect of Electropulsing Treatment on Properties of Pre-compressed AZ31 Magnesium Alloy

The effect of electropulsing treatment (EPT) on quasi-static compression behavior and anisotropy of AZ31 Mg alloy were investigated based on quasi-static compression test. The results show that the orientation of the sample has a significant effect on the deformation mechanism of metal and this mechanism can be changed by pre-deformation and EPT. However, the strain rate sensitivity of the material is not affected by pre-deformation. Compared with the as-received plates, the anisotropy of AZ31 Mg alloy increased in ND-RD plane after pre-compression along the transverse direction, the ∆YS of specimens increased from 87 MPa to 98 MPa. After EPT, the anisotropy of AZ31 Mg alloy gradually decreased with the change of EPT temperature and EPT time, the ∆YS of the sample reached 14.2 MPa when EPT conducted at 200 ℃ for 15 min, which decreased 72.8 MPa compared with the as-received plates.本研究通过准静态压缩试验，探究了电脉冲处理（Electropulsing Treatment, EPT）对AZ31镁合金准静态压缩行为与各向异性的影响。结果表明，试样的取向对金属变形机制具有显著影响，且该变形机制可通过预变形与电脉冲处理进行调控。然而，材料的应变速率敏感性并未受预变形的影响。与原始供货板材相比，沿横向预压缩后，AZ31镁合金在ND-RD平面内的各向异性有所提升，试样的屈服强度差值（ΔYS）从87 MPa升至98 MPa。经电脉冲处理后，AZ31镁合金的各向异性随电脉冲处理温度与处理时长的变化逐渐降低；当在200℃下处理15 min时，试样的ΔYS仅为14.2 MPa，较原始供货板材降低了72.8 MPa。