Behavior of 321 stainless steel under engineering stress and strain controlled fatigue

被引：28

作者：

Reddy, G. V. Prasad ^{[1
]}

Dinesh, P. M. ^{[2
]}

Sandhya, R. ^{[1
]}

Laha, K. ^{[1
]}

Jayakumar, T. ^{[3
]}

机构：

[1] Indira Gandhi Ctr Atom Res, Mech Met Div, Kalpakkam 603102, Tamil Nadu, India

[2] Indian Navy, Visakhapatnam 530014, Andhra Pradesh, India

[3] Natl Inst Technol, Dept Met & Mat Engn, Warangal 506004, Andhra Pradesh, India

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2016年 / 92卷

关键词：

321 stainless steel; Low cycle fatigue; Ratcheting; S-N curve; ASME fatigue curve; LOW-CYCLE FATIGUE; DEFORMATION;

D O I：

10.1016/j.ijfatigue.2016.07.009

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Cyclic deformation and fracture behavior of the 321 stainless steel are investigated at 633 K under engineering-stress and strain controlled low cycle fatigue (LCF) cycling, and the fatigue life data are compared with ASME section-III Division-1 S-N curve. In stress-controlled LCF tests, ratcheting-strain accumulation is observed even under zero mean-stress, and the direction of ratcheting is found to strongly depend on initial-ramp direction of first-cycle. In addition, plastic-strain range and striation width are observed to be higher than those in strain-controlled tests. The stress-life curve obtained from stress controlled tests is 2-3 orders of magnitude lower in comparison to stress-life curve derived from strain-controlled LCF tests as per the ASME procedure. The discrepancy is attributed to the differences in deformation and damage development in stress and strain-controlled cycling. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：272 / 280

页数：9

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