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单选题
两个接触表面相对滚动或滑动时,在接触区形成的循环交变应力超过材料的()时,使接触表面产生塑性变形和微裂纹,进而裂纹扩展,产生金属剥落的现象称为疲劳磨损。
A
屈服强度
B
抗拉强度
C
疲劳强度
D
持久强度
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