IMECH-IR  > 非线性力学国家重点实验室
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.
Source PublicationINTERNATIONAL JOURNAL OF FATIGUE
2016
Volume93Issue:2Pages:352-362
ISSN0142-1123
Abstract

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.

KeywordVery-high-cycle Fatigue Surface Defect Fine-granular-area Crack Initiation Structural Steel
DOI10.1016/j.ijfatigue.2016.05.032
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000385604900017
WOS KeywordVery-high-cycle fatigue ; Surface defect ; Fine-granular-area ; Crack initiation ; Structural steel
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Mechanical ; Materials Science, Multidisciplinary
Funding OrganizationThe 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).
DepartmentLNM金属材料微结构与力学性能
Classification一类
RankingTrue
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59700
Collection非线性力学国家重点实验室
Corresponding AuthorHong, YS (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Recommended Citation
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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