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21MPa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21MPa、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.
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