Tensile and Isothermal Fatigue Behaviors of Mg-12Gd-3Y-0.5Zr Alloy at High Temperature

查看全文 作　　者：Xiaoming [1]Yang;Huajie [1]Yang;Fan [1]Yang;Shuming [1]Yin;Wei [1]Wang;Shouxin [1]Li;Qudong [2]Wang

机构地区：[1]Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences Shenyang 110016, China;[2]National Engineering Research Center of Light Alloys Net Forming, Shanghai Jiao Tong University, Shanghai 200020 China

出　　处：《Journal of Materials Science & Technology》索引2009年第25卷第6期,共7页

摘　　要：Tensile and isothermal fatigue tests were carried out on an as-rolled Mg-12Gd-3Y-0.5Zr alloy and its heat-treated counterpart at different temperatures. The experimental results show that the ultimate tensile strengths of two alloys decrease very slowly with increasing temperature up to 200?C. The ultimate tensile strength of heat-treated Mg-12Gd-3Y-0.5Zr is slight lower than that of as-rolled counterpart; however, the fatigue strength of heat-treated alloy is higher. The mechanism of fatigue failure was investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It shows that cyclic slip combined with environmental effect may be the main crack initiation mechanism. 关键词：拉伸强度合金疲劳性能等温透射电子显微镜扫描电子显微镜镁高温

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Tensile and Isothermal Fatigue Behaviors of Mg-12Gd-3Y-0.5Zr Alloy at High Temperature

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