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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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铜双晶体中晶界及组元晶体的疲劳寿命
, PP. 51-56
Keywords: 铜双晶体,疲劳寿命,S-N曲线,裂纹萌生
Abstract:
本文对具有单、双滑移取向组元晶体的近垂直晶界钢双晶体进行拉-拉循环变形、得出铜双晶体中晶界及组元晶体的S-N曲线，比较了铜双晶体晶界及组元晶体疲劳寿命的差别，发现在相同的应力幅下晶界的疲劳寿命明显低于组元晶体的疲劳寿命，但两不同取向的组元晶体的疲劳寿命相差不大,通过对表面疲劳裂纹萌生的观察，发现垂直晶界铜双晶体在相同的循环载荷下萌生致命疲劳裂纹并导致疲劳断裂的难易顺序为双滑移取向晶体→单滑移取向晶体→晶界
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