The fatigue behavior and mechanism of FV520B-I with large surface roughness in a very high cycle regime

被引：21
|
作者：
Zhang, Ming [1 ,2 ,3 ]
Wang, Weiqiang [1 ,3 ]
Wang, Pengfei [1 ,3 ]
Liu, Yan [1 ,3 ]
Li, Jianfeng [1 ,4 ]
机构：
[1] Shandong Univ, Sch Mech Engn, 17923 Jingshi Rd, Jinan 250061, Peoples R China
[2] Qilu Univ Technol, Sch Mech & Automot Engn, 3501 Daxue Rd, Jinan 250353, Peoples R China
[3] Engn & Technol Res Ctr Special Equipment Safety S, 17923 Jingshi Rd, Jinan 250061, Peoples R China
[4] Minist Educ, Key Lab High Efficiency & Clean Mech Manufacture, 17923 Jingshi Rd, Jinan 250061, Peoples R China
来源：
ENGINEERING FAILURE ANALYSIS | 2016年 / 66卷
关键词：
FV520B-I; Surface roughness; Very high cycle fatigue; Surface fatigue limit; Competition mechanism; HIGH-STRENGTH STEELS; NON-METALLIC INCLUSIONS; QUANTITATIVE-EVALUATION; CRACK INITIATION; FAILURE;
D O I：
10.1016/j.engfailanal.2016.04.029
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The fatigue properties of FV520B-I up to 10(9) cycles when the surface roughness R-a approximate to 0.6 were tested and compared with two groups of previously obtained test results. The test results showed that the S-N curve continuously moved downward and the transition stress at which the crack origin changed from the surface to the subsurface decreased with an increase of surface roughness, and the conventional fatigue limit finally appeared. The initiation mechanism of subsurface cracks in a very high cycle fatigue regime was independent of surface roughness. The surface fatigue limit and the high cycle fatigue life were predicted by relevant models. The competition mechanism between surface cracking and subsurface cracking was further discussed. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：432 / 444
页数：13
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