周衡志,邹学武,白允强,贺显聪,王章忠

• 1:南京工程学院材料工程学院

摘要(Abstract)：

在Mg2Si增强的AZ91镁基复合材料试样上首先预制疲劳裂纹,然后在疲劳载荷的作用下向试样裂纹尖端渗注纳米CeO2/Ni-P复合镀液,采用SEM、EDS及XRD表征了沉积产物的形貌和结构,探讨了产物的沉积行为对镁基复合材料疲劳裂纹扩展的影响规律。结果表明,试验所用镁基复合材料的疲劳门槛值约为1.8 MPa.m1/2,纳米复合镀液能在镁基复合材料的裂纹尖端形成层片状膜层,并且膜层中的纳米CeO2颗粒分散均匀。复合镀液的沉积起到了明显的延滞裂纹扩展的作用,可以在高于镁基复合材料疲劳门槛值的载荷下使裂纹不扩展。

关键词(KeyWords)： 镁基复合材料;复合化学镀;疲劳裂纹;疲劳门槛值

Abstract:

Keywords:

基金项目(Foundation): 南京工程学院校级科研基金项目(KJB201203);; 南京工程学院创新基金项目(CKJ2011002)

作者(Author): 周衡志,邹学武,白允强,贺显聪,王章忠

DOI: 10.13289/j.issn.1009-6264.2013.01.006

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