EFFECT OF SHOT PEENING ON RESIDUAL-STRESS AND FATIGUE LIFE OF A SPRING STEEL

被引：161

作者：

FARRAHI, GH

LEBRUN, JL

COURATIN, D

机构：

[1] ECOLE NATL SUPER ARTS & METIERS,F-75013 PARIS,FRANCE

[2] RENAULT SA,F-92109 BOULOGNE,FRANCE

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1995年 / 18卷 / 02期

关键词：

D O I：

10.1111/j.1460-2695.1995.tb00156.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This study describes shot peening effects such as shot hardness, shot size and shot projection pressure, on the residual stress distribution and fatigue life in reversed torsion of a 60SC7 spring steel. There appears to be a correlation between the fatigue strength and the area under the residual stress distribution curve. The biggest shot shows the best fatigue life improvement. However, for a shorter time of shot peening, small hard shot showed the best performance. Moreover, the superficial residual stresses and the amount of work hardening (characterised by the width of the X-ray diffraction line) do not remain stable during fatigue cycling. Indeed they decrease and their reduction rate is a function of the cyclic stress level and an inverse function of the depth of the plastically deformed surface layer.

引用

页码：211 / 220

页数：10

共 22 条

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