文献类型：期刊文献

英文题名：Effect of frequency on very high cycle fatigue behavior of a low strength Cr-Ni-Mo-V steel welded joint

作者：Zhu, Ming-Liang[1];Liu, Long-Long[1];Xuan, Fu-Zhen[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：2015

卷号：77

起止页码：166

外文期刊名：INTERNATIONAL JOURNAL OF FATIGUE

收录：;EI(收录号：20151600745688);WOS:【SCI-EXPANDED(收录号:WOS:000354147300016)】；

基金：The authors are grateful for the supports provided by the National Natural Science Foundation of China (51325504, 51205131), the Natural Science Foundation of Shanghai (12ZR1442900), and the Specialized Research Fund for the Doctoral Program of Higher Education (20120074120010).

语种：英文

外文关键词：Very high cycle fatigue; Loading frequency; Welded joint; Fatigue crack initiation; Fracture location

摘要：Axially fully-reversed fatigue test of a low strength Cr-Ni-Mo-V steel welded joint was conducted up to the very high cycle fatigue regime under the frequency of 110 Hz and 20 kHz. The S-N curve shows a duplex shape at low frequency while decreases continuously at high frequency. Sites of crack initiation and fracture of the welds depend on stress level and loading frequency, hence leading to changed fatigue strength. In addition, frequency effect varies among different parts of the welded joint and fatigue lifetime. (C) 2015 Elsevier Ltd. All rights reserved.