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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Cu双晶的循环形变行为与疲劳裂纹萌生Ⅱ.疲劳裂纹萌生与早期扩展
, PP. 824-830
Keywords: Cu双晶,疲劳裂纹萌生,疲劳裂纹早期扩展
Abstract:
用扫描电镜（SEM）观察了受应变疲劳载荷作用的Cu双晶的表面形貌，发现晶界是疲劳形变双晶最有利的裂纹萌生地点．在滑移带撞击晶界的地方，特别是在几条粗滑移带共同撞击晶界的地方观察到许多疲劳微裂纹；并且发现与平行晶界双晶相比，垂直晶界双晶中极有利于疲劳裂纹沿晶界作早期扩展一种PSB－GB疲劳裂纹萌生机制可用来解释这些沿晶疲劳裂纹的形成．
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