超塑性变形的主要机制是细小晶粒的晶界滑动，适当的微量液相有利于该复合材料的高应变速率超塑性。

The dominant process of superplastic deformation is fine grain boundary sliding, and an appropriately small amount of liquid phase can enhance the high strain rate superplasticity of the composite.

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综述了镁合金超塑性的研究进展，总结了镁合金超塑性变形的微观机理，评述了镁合金高应变速率超塑性的研究状况，提出了几个需要解决的问题和研究方向。

The current status of research on high strain rate superplasticity of magnesium alloys is then examined, and several problems to be solved and future directions are suggested.

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在高应变速率条件下，LY 12铝合金具有较好的超塑性和室温性能。

In higher strain-rate condition, LY12 alloy has good superplasticity and room temperature properties.

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