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Title:
Fatigue crack growth behavior in gradient microstructure of hardened surface layer for an axle steel
Author: Zhang, Shijia; Xie JJ(谢季佳); Jiang, Qingqing; Zhang, Xiaole; Sun CQ(孙成奇); Hong YS(洪友士)
Source: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Issued Date: 2017-07-17
Volume: 700, Pages:66-74
Abstract: This paper experimentally investigated the behavior of fatigue crack growth of an axle steel with a surface strengthened gradient microstructure layer. First, the microstructure, residual stress and mechanical properties were examined as a function of depth from surface. Then the fatigue crack growth rate was measured via three point bending fatigue testing. The results indicated that fatigue crack growth rate decelerated first and then accelerated with the increase of crack length within the gradient layer. Especially, the fatigue crack was arrested in the gradient layer under relatively low stress amplitude due to the increase of threshold value for crack growth within the range of 3 mm from surface. Based on these results, the parameters of Paris equation and the threshold value of stress intensity factor range within the gradient layer were determined and a curved surface was constructed to correlate crack growth rate with stress intensity factor range and the depth from surface. The effects of microstructure, residual stress and surface notch on the crack growth behavior were also discussed.
Keyword: Fatigue crack growth ; Surface strengthening ; Gradient microstructure ; Residual stress ; Crack arrest
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Hong, YS (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Correspondent Email: hongys@imech.ac.cn
DOI: 10.1016/j.msea.2017.05.104
Related URLs: 查看原文
DOC Type: Article
WOS Subject: Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS Subject Extended: Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS Keyword Plus: HIGH-CYCLE FATIGUE ; AUSTENITIC STAINLESS-STEEL ; RESIDUAL-STRESSES ; ALUMINUM-ALLOY ; ASPECT RATIO ; GRAIN-SIZE ; STRENGTH ; RESISTANCE ; CARBURIZATION ; PROPAGATION
WOS ID: WOS:000406564300009
ISSN: 0921-5093
Funder: National Natural Science Foundation of China(11572325) ; Chinese Academy of Sciences(XDB22040503 ; XDB22020201)
Department: LNM实验平台 ; LNM微结构计算力学
Classification: 一类
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/70056
Appears in Collections:非线性力学国家重点实验室_期刊论文

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Recommended Citation:
Zhang, Shijia,Xie JJ,Jiang, Qingqing,et al. Fatigue crack growth behavior in gradient microstructure of hardened surface layer for an axle steel[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2017-07-17,700:66-74.
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