The effective threshold for fatigue crack propagation: A plastic size effect?

被引：11
|
作者：
Sevillano, JG
机构：
[1] Univ Navarra, TECNUN, CEIT, San Sebastian 20018, Spain
[2] Univ Navarra, TECNUN, Fac Engn, San Sebastian 20018, Spain
来源：
SCRIPTA MATERIALIA | 2001年 / 44卷 / 11期
关键词：
mechanical properties; fatigue; plasticity; fatigue threshold;
D O I：
10.1016/S1359-6462(01)00948-4
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of plastic size effect to the fatigue threshold was studied. The plastic size effect was found to be related to the increasing importance of the plastic strain gradient inherent to the plastic zone associated with the crack tip. This would explain the existence and value of an intrinsic threshold for crack propagation by fatigue of metals. A normalized value of the intrinsic fatigue threshold was found to be only slightly dependent on the nature or microstructure of the metal.
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页码：2661 / 2665
页数：5
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