Fatigue damage in two step loading of 316L steel .1. Evolution of persistent slip bands

被引：21

作者：

Polak, J ^{[1
]}

Vasek, A ^{[1
]}

Obrtlik, K ^{[1
]}

机构：

[1] ECOLE CENT LILLE,URA CNRS 1441,LAB MECAN LILLE,F-59651 VILLENEUVE DASCQ,FRANCE

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1996年 / 19卷 / 2-3期

关键词：

316L stainless steel; cyclic slip localization; persistent slip bands; two-step loading; surface evolution; fatigue damage;

D O I：

10.1111/j.1460-2695.1996.tb00954.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

An experimental study of the surface evolution during controlled plastic strain amplitude single-step and two-step loading tests reveals the important damage mechanisms for 316L stainless steel. In the first stage, the cyclic plastic strain is concentrated into persistent slip bands (PSBs) and a surface relief is formed consisting of extrusions and intrusions. The frequency of occurrence and the total density of PSBs has been assessed using systematic observations in a scanning electron microscope. The relative volume occupied by PSBs determines the fatigue damage in this stage. Two-step loading has only a small effect on the PSB damage evolution and nearly equal saturated values (corresponding to the applied plastic strain amplitude) were achieved in the single-step and the two-step loading investigations.

引用

页码：147 / 155

页数：9