冯靖凯,张丁非,袁圆,陈霞,赵阳,蒋斌,潘复生

• 1:重庆大学材料科学与工程学院
• 2:重庆大学国家镁合金材料工程技术研究中心
• 3:重庆市科学技术研究院

摘要(Abstract)：

采用光学显微镜(OM),电子背散射衍射(EBSD),X射线衍射仪(XRD)等分析方法,研究了挤压-剪切(ES)工艺转角对AZ31镁合金组织和性能的影响。结合Deform-3D技术对不同角度ES过程成形载荷、等效应变和挤压速度场进行模拟研究。结果表明:挤压-剪切工艺可以通过促进动态再结晶从而进一步细化AZ31镁合金的晶粒尺寸,且随着剪切内角φ的减小,晶粒尺寸更小。此外转角的加入会弱化挤压部分形成的强基面织构,进一步改善合金的综合力学性能,合金的屈服强度和抗拉强度升高,伸长率略微下降。当剪切角度为150°时,合金的综合力学性能最好,屈服强度为237.5 MPa,抗拉强度为299.2 MPa,伸长率为11.3%。

关键词(KeyWords)： 挤压-剪切;镁合金;模拟;组织和性能

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2016YFB0301101);; 国家自然科学基金面上项目(51571040);国家自然科学基金重点项目(U1764253;51531002)

作者(Author): 冯靖凯,张丁非,袁圆,陈霞,赵阳,蒋斌,潘复生

DOI: 10.13289/j.issn.1009-6264.2019-0244

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