Very-high-cycle fatigue behavior of a structural steel with and without induced surface defects

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	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)
刊名	INTERNATIONAL JOURNAL OF FATIGUE
	2016
通讯作者邮箱	hongys@imech.ac.cn
卷号	93 期号:2 页码:352-362
关键词	Very-high-cycle fatigue Surface defect Fine-granular-area Crack initiation Structural steel
ISSN号	0142-1123
通讯作者	Hong, YS (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
产权排序	[Jiang, Qingqing; Sun, Chengqi; Liu, Xiaolong; Hong, Youshi] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
中文摘要	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.
分类号	二类/Q1
类目[WOS]	Engineering, Mechanical ; Materials Science, Multidisciplinary
研究领域[WOS]	Engineering ; Materials Science
关键词[WOS]	Very-high-cycle fatigue ; Surface defect ; Fine-granular-area ; Crack initiation ; Structural steel
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1016/j.ijfatigue.2016.05.032
语种	英语
WOS记录号	WOS:000385604900017
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/59700]
专题	力学研究所_非线性力学国家重点实验室
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.(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.