镁合金通常塑性较差,改善其塑性是实现其规模化应用的需要.在介绍镁合金塑性变形机制的基础上,主要包括滑移、孪生和晶界滑动机制等,讨论了传统改善其塑性的方法,即优化合金成分、控制组织和协调变形温度-速度条件以及目前提高塑性的新途径,包括提高等轴晶比例、控制脆性相的形态及分布和施加外场等.简述了变形镁合金超塑性的机制与应用,提出了镁合金超塑性未来的发展方向.
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