王海清,李建波,王毅涛,罗欢,陈旭,陈先华,潘复生

• 1:重庆大学材料科学与工程学院

摘要(Abstract)：

通过半固态搅拌铸造和热挤压工艺制备了TC4(Ti-6Al-4V)颗粒增强Mg-13Gd-5Y-2Zn-1Mn镁基复合材料，采用光学显微镜、扫描电镜、单轴压缩试验和三点弯曲试验分析了其显微组织及变形行为。结果表明，在挤压过程中，TC4颗粒阻碍了其周边晶粒的动态再结晶过程和长周期堆垛有序(LPSO)相的变形，晶粒的织构方向发生改变，在基体内形成了LPSO相、TC4颗粒、再结晶晶粒和变形晶粒组成的不同区域。复合材料的压缩性能相较于基体材料得到了较大提升，其压缩屈服强度和极限抗压强度可达到450和637 MPa,压缩应变为10.1%。在压应力作用下，复合材料内出现以■孪晶为主的大量变形孪晶，产生了较强的孪晶强化。

关键词(KeyWords)： 稀土;镁基复合材料;TC4颗粒;LPSO;变形行为

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2022YFB3708400);; 国家自然科学基金(52171133)

作者(Author): 王海清,李建波,王毅涛,罗欢,陈旭,陈先华,潘复生

DOI: 10.13289/j.issn.1009-6264.2023-0472

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