师亚娟,金培鹏,王金辉,张飞,陈逢源

• 1:青海大学高性能轻金属合金及深加工国家地方联合工程研究中心

摘要(Abstract)：

对35%(体积分数)的氧化锌涂覆硼酸镁晶须增强的AZ31镁基复合材料分别在14、21、28和35 MPa下进行了加载热循环实验。结果表明,材料在第一次热循环后产生较大残余应变,且在相同的热循环次数下,其累积残余应变随外加载荷及循环上限温度增大而增大。在21 MPa下材料经历16次热循环后其应变速率随循环次数增加先增大后减小,直至趋于稳定。在35 MPa、20~320℃及21 MPa、20~400℃条件下复合材料发生热棘齿现象。材料在热循环后具有较强的超塑性,变形机制主要为位错滑移和孪晶。

关键词(KeyWords)： 镁基复合材料;氧化锌涂覆的硼酸镁晶须;热循环;超塑性

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划资助项目(2011CB612200)

作者(Author): 师亚娟,金培鹏,王金辉,张飞,陈逢源

DOI: 10.13289/j.issn.1009-6264.2014.01.003

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