研究了退火处理对热挤压Mg-5 mass％ Zn-1 mass％Y合金组织及性能的影响.结果表明,425 ℃/15 min为该合金的最佳退火工艺,完全再结晶同时避免晶粒长大,所获得晶粒尺寸仅为10μm.该条件下退火合金的抗拉强度为284.8 MPa,断后伸长率高达31.2％,较高的强度与细小再结晶晶粒及弥散分布的第二相有关;较高伸长率主要源于拉伸过程中{1012}拉伸孪生、{1011}压缩孪生以及({1012}-{1011})拉压二次孪生引起的协调变形.
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