文献类型：期刊文献

英文题名：Small fatigue crack growth mechanisms of 304 stainless steel under different stress levels

作者：Deng, G. J.[1];Tu, S. T.[1];Wang, Q. Q.[1];Zhang, X. C.[1];Xuan, F. Z.[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China

年份：2014

卷号：64

起止页码：14

外文期刊名：INTERNATIONAL JOURNAL OF FATIGUE

收录：;EI(收录号：20141217474255);WOS:【SCI-EXPANDED(收录号:WOS:000335097500002)】；

基金：The authors are grateful for the support by National Natural Science Foundations of China (51175177 and 11172102). X.C. Zhang is also grateful for the support by New Century Excellent Talents in University (NCET-11-0643) and Shanghai Pujiang Program and Key Research Program of Shanghai Science and Technology Committee (12JC1403200).

语种：英文

外文关键词：Small crack; Fatigue; Replica; Stress level; Stainless steel

摘要：The aim of this paper was to clarify the fatigue crack initiation and small crack growth mechanisms of 304 austenitic stainless steel at different stress levels. Results showed that the stress level effect on small crack growth rates could hardly be distinguished for the stress levels tested. Grain boundaries might act as the crack initiation sites and played an important role on the propagation of small cracks. Once the surface crack length reached the critical size of 0.2 mm, the crack would propagate fairly quickly, resulting in fracture of specimen. (C) 2014 Elsevier Ltd. All rights reserved.