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
收藏
页码：272 / 280
页数：9
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