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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Ni_3(Al,Zr)单晶循环变形行为的研究
, PP. 513-518
Keywords: Ｎｉ_３（Ａｌ,Ｚｒ）,循环变形,拉压应力,硬化
Abstract:
通过对Ｎｉ_３（Ａｌ，Ｚｒ）单晶在室温下对称拉－压循环变形实验，发现存在拉－压流变应力的不对称性和循环应变硬化现象。应力不对称性随所加循环应变的增大而增大。循环应力响应曲线可分为循环硬化及循环饱和两个阶段。透射电子显微镜（ＴＥＭ）观察表明疲劳试样中的超结构位错主要以超结构内禀堆垛层错（ＳＩＳＦ）形式存在，这种位错结构是产生应变硬化的主要原因。
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