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

被引：52
|
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
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2015年 / 77卷
基金：
中国国家自然科学基金; 上海市自然科学基金;
关键词：
Very high cycle fatigue; Loading frequency; Welded joint; Fatigue crack initiation; Fracture location; LOADING FREQUENCY; LOW-CARBON; CRACK INITIATION; BEARING STEEL; PROPAGATION; MECHANISM; MICROSTRUCTURE; DEFORMATION; NIOBIUM; ALLOYS;
D O I：
10.1016/j.ijfatigue.2015.03.027
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
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.
引用
收藏
页码：166 / 173
页数：8
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