张利,荆洪英,刘正

• 1:沈阳航空航天大学材料科学与工程学院
• 2:沈阳航空航天大学机电工程学院
• 3:沈阳工业大学材料科学与工程学院

摘要(Abstract)：

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。

关键词(KeyWords)： 退火处理;热挤压;Mg-5Zn-1Y合金;准晶Mg3Zn6Y相;({1012}-{1011})二次孪生

Abstract:

Keywords:

基金项目(Foundation): 辽宁省教育厅项目(L2014071)

作者(Author): 张利,荆洪英,刘正

DOI: 10.13289/j.issn.1009-6264.2016.04.011

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