Effects of inclusion size and stress ratio on fatigue strength for high-strength steels with fish-eye mode failure

被引：74

作者：

Sun, Chengqi ^{[1
]}

Lei, Zhengqiang ^{[1
]}

Xie, Jijia ^{[1
]}

Hong, Youshi ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2013年 / 48卷

关键词：

Very-high-cycle fatigue; Inclusion size; Stress ratio; Fatigue strength; High-strength steels; HIGH-CYCLE FATIGUE; SUBSURFACE CRACK INITIATION; CHROMIUM-BEARING STEEL; LONG-LIFE FATIGUE; S-N CURVE; GIGACYCLE FATIGUE; BEHAVIOR; REGIME; MECHANISM; PREDICTION;

D O I：

10.1016/j.ijfatigue.2012.12.004

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Experimental results indicate that the fatigue life reduces by about two orders of magnitude when inclusion size doubles. Then, a model is proposed for predicting the fatigue strength of high-strength steels with fish-eye mode failure based on the experimental results for the effect of inclusion size and stress ratio. In the model, the effect of inclusion size a(o) and stress ratio R on fatigue strength sigma(a) is expressed as sigma(a) proportional to a(o)(m)[(1 - R)/2](alpha), where m and a are material parameters. The predicted results are in good agreement with our experimental results and the ones reported in literature. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：19 / 27

页数：9

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