文献类型：期刊文献

英文题名：Effects of defect size and location on high cycle fatigue life of a maraging stainless steel at ambient and cryogenic temperatures

作者：Chang, Dong-Kai[1];Wang, Qiong-Qi[1];Chen, Hui[2];Zhang, Xian-Cheng[1];Wen, Jian-Feng[1];Tu, Shan-Tung[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Xian Aerosp Prop Inst, Xian 710100, Peoples R China

年份：2022

卷号：161

外文期刊名：INTERNATIONAL JOURNAL OF FATIGUE

收录：;EI(收录号：20221611977720);WOS:【SCI-EXPANDED(收录号:WOS:000799326900006)】；

基金：The authors are grateful for the support provided by the National Key Basic Research Program of China. Financial supports from the National Key R&D Program of China (Grant No. 2018YFC0808800) , National Science and Technology Major Project (Grant No. J2019-IV-0010-0078) and the Fundamental Research Funds for the Central Universities are also gratefully acknowledged. Special thanks are due to members at Key Laboratory of Pressure Systems and Safety, Ministry of Education, for their contribution to fatigue tests.

语种：英文

外文关键词：High cycle fatigue; Cryogenic temperature; Crack initiation; Defect distribution; Life prediction

摘要：In some extreme service environments, materials with properties to resist cryogenic temperatures and intense vibration are required. In this study, high cycle fatigue (HCF) tests with different stress ratios were conducted on maraging stainless steel at both ambient and cryogenic temperatures. Fracture surface observation indicates that internal fatigue crack initiation prevails over surface initiation at cryogenic temperatures. A normalization method was proposed to examine the effects of defect size and location on the fatigue life. Furthermore, the Z parameter was modified to predict HCF life at different stress ratios and temperatures, with improved accuracy.