Very-high-cycle fatigue behavior of a structural steel with and without induced surface defects | |
Jiang QQ; Sun CQ(孙成奇); Liu XL(刘小龙); Hong YS(洪友士); Hong, YS (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China. | |
发表期刊 | INTERNATIONAL JOURNAL OF FATIGUE |
2016 | |
卷号 | 93期号:2页码:352-362 |
ISSN | 0142-1123 |
摘要 | Fatigue tests via rotary bending were performed on the specimens with and without induced surface defects for a structural steel of medium carbon content to investigate the effect of surface defects on fatigue behavior in high-cycle fatigue and very-high-cycle fatigue (VHCF) regimes. The S-N data showed that induced surface defects substantially degraded the related fatigue strength. For the specimens without surface defects failed in VHCF regime, crack initiated from the interior of specimens with inclusions or matrix inhomogeneities as crack origin and the initiation regions were of different extents of rough surface. The observations on the profile samples cut from crack initiation regions revealed that the region was a layer of nanograins for the case of inclusion as crack origin, and was without grain refinement for the case of grain boundary as crack origin. For the specimens with induced surface defects, crack initiated from surface defects and the initiation region was without grain refinement. The characteristics of crack initiation were carefully examined and the effect of surface defects on fatigue strength degradation was analyzed by available models. (C) 2016 Elsevier Ltd. All rights reserved. |
关键词 | Very-high-cycle Fatigue Surface Defect Fine-granular-area Crack Initiation Structural Steel |
DOI | 10.1016/j.ijfatigue.2016.05.032 |
URL | 查看原文 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000385604900017 |
关键词[WOS] | Very-high-cycle fatigue ; Surface defect ; Fine-granular-area ; Crack initiation ; Structural steel |
WOS研究方向 | Engineering ; Materials Science |
WOS类目 | Engineering, Mechanical ; Materials Science, Multidisciplinary |
项目资助者 | The authors would like to appreciate the financial supports from the National Basic Research Program of China (2012CB937500) and from the National Natural Science Foundation of China (11572325). |
课题组名称 | LNM金属材料微结构与力学性能 |
论文分区 | 一类 |
力学所作者排名 | True |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/59700 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Hong, YS (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China. |
推荐引用方式 GB/T 7714 | Jiang QQ,Sun CQ,Liu XL,et al. Very-high-cycle fatigue behavior of a structural steel with and without induced surface defects[J]. INTERNATIONAL JOURNAL OF FATIGUE,2016,93,2,:352-362. |
APA | Jiang QQ,Sun CQ,Liu XL,Hong YS,&Hong, YS .(2016).Very-high-cycle fatigue behavior of a structural steel with and without induced surface defects.INTERNATIONAL JOURNAL OF FATIGUE,93(2),352-362. |
MLA | Jiang QQ,et al."Very-high-cycle fatigue behavior of a structural steel with and without induced surface defects".INTERNATIONAL JOURNAL OF FATIGUE 93.2(2016):352-362. |
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