Experimental and theoretical investigation of environmental media on very-high-cycle fatigue behavior for a structural steel

doi:10.1016/j.actamat.2010.10.064

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	Experimental and theoretical investigation of environmental media on very-high-cycle fatigue behavior for a structural steel
	Qian GA(钱桂安); Zhou CE(周承恩); Hong YS(洪友士); Hong, YS (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
发表期刊	Acta Materialia
	2011
卷号	59 期号:4 页码:1321-1327
ISSN	1359-6454
摘要	Rotary bending fatigue tests were performed in laboratory air and 3.5% NaCl aqueous solution to investigate the influence of environmental media on fatigue properties of a structural steel in high-cycle and very-high-cycle fatigue regimes. The results show that the fatigue strength of the structural steel in 3.5% NaCl solution is remarkably degraded compared with the case tested in laboratory air. The fracture surfaces of specimens tested in different environments were examined to reveal the fatigue crack initiation characteristics. It shows that for specimens tested in 3.5% NaCl solution, cracks originate via multiple surface initiation modes and cracking is intergranular; in addition, widespread secondary cracks feature on the fracture surface. Based on fatigue tests and fractography observations, a numerical model of crack initiation is proposed to describe the transition of fatigue initiation site from subsurface to surface for specimens tested in air and 3.5% NaCl solution. The model reveals the influences of load, material strength, grain size, inclusion size and surface environmental media on the crack initiation site transition. It agrees well with the experimental observations. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Very-high-cycle Fatigue Aqueous Environment Fatigue Strength Fatigue Crack Initiation Structural Steel High-strength Steels Chromium-bearing Steel S-n Characteristics Gigacycle Fatigue Hydrogen Transport Failure Mechanism Humidity Surface Regime
学科领域	Materials Science ; Metallurgy & Metallurgical Engineering
DOI	10.1016/j.actamat.2010.10.064
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000287265100001
关键词[WOS]	HIGH-STRENGTH STEELS ; CHROMIUM-BEARING STEEL ; S-N CHARACTERISTICS ; GIGACYCLE FATIGUE ; HYDROGEN TRANSPORT ; FAILURE ; MECHANISM ; HUMIDITY ; SURFACE ; REGIME
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
项目资助者	This work was funded by the National Natural Science Foundation of China (Nos. 10772178 and 10721202) and the Knowledge Innovation Program of the Chinese Academy of Sciences (No. KJCX2-YW-L07). The authors are thankful to Professor Tatsuo Sakai of Ritsumeikan University of Japan for his generously providing the rotary bending machine.
课题组名称	LNM金属材料微结构与力学性能
论文分区	一类
引用统计	被引频次：58[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/44946
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, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Qian GA,Zhou CE,Hong YS,et al. Experimental and theoretical investigation of environmental media on very-high-cycle fatigue behavior for a structural steel[J]. Acta Materialia,2011,59,4,:1321-1327.
APA	钱桂安,周承恩,洪友士,&Hong, YS .(2011).Experimental and theoretical investigation of environmental media on very-high-cycle fatigue behavior for a structural steel.Acta Materialia,59(4),1321-1327.
MLA	钱桂安,et al."Experimental and theoretical investigation of environmental media on very-high-cycle fatigue behavior for a structural steel".Acta Materialia 59.4(2011):1321-1327.

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