中文摘要：

研究低压脉冲磁场对半连续铸造AZ80镁合金凝固组织及性能的影响。结果表明：低压脉冲磁场半连续铸造AZ80合金凝固组织发生了明显的细化,枝晶形貌由粗大的枝晶变为细小的蔷薇状。AZ80半连续铸锭的变形能力大大提升,相比未施加脉冲磁场制备的AZ80半连续铸锭,其心部变形后塑性提高了80%以上。

英文摘要：

The effects of a low-voltage pulsed magnetic field on the solidified structure and mechanical properties of DC casting AZ80 magnesium alloy were investigated.The results showed that the solidified structure of the DC casting AZ80 magnesium alloy was refined obviously by the low-voltage pulsed magnetic field and significant grain refinement in the DC casting ingot of AZ80 magnesium alloy was achieved.Meanwhile,the morphology of the dentritic in the DC casting ingot was transformed from coarse dentritic to fine rosette with the application of low-voltage pulsed magnetic field.The ability of deformation of the ingot was enhanced and especially the plasticity of the ingot center after upsetting was improved greatly by more than 80%after deformation.