Effects of environment on the overload behavior of fatigue

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	Effects of environment on the overload behavior of fatigue
	Guan, H ; Li, J ; Wei, XJ ; Han, EH ; Ke, W
刊名	ACTA METALLURGICA SINICA
	2003-06-01
卷号	39 期号:6 页码:613-616
关键词	environment stainless steel fatigue crack propagation overload
ISSN号	0412-1961
通讯作者	Guan, H()
英文摘要	The effects of 3.5% NaCl aqueous solution on the overload retardation behaviour of AISI 321 stainless steel fatigued under constant DeltaK was investigated. The results show that, compared with the air, the environment reduces the overload retardation effect significantly, although the overload behaviors in the air and environment are similar. The reducing level is approximately 40%-70% in terms of loss cycle number, and 30-40% in terms of overload affecting zone size. The comparison of the above two parameters shows that the former is not a proper parameter to describe the overload effect because of not distinguishing between the strengthening and reducing effects of environment on the crack closure. The later is a better parameter to describe the overload effect because it can distinguish the environmental effect on the crack closure from the comprehensively environmental effects on both crack closure and crack tip. SEM analysis of the fracture surface shows that the overload plastic strain suffered more erosion in environment than in air. It is suggested that the reduction of the plasticity-induced crack closure caused by environmental corrosion-erosion is responsible for the reduction of the overload retardation effect.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000183958400012
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/117914]
专题	金属研究所_中国科学院金属研究所
通讯作者	Guan, H
作者单位	1.Chinese Acad Sci, Met Res Inst, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China 2.Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China
推荐引用方式 GB/T 7714	Guan, H,Li, J,Wei, XJ,et al. Effects of environment on the overload behavior of fatigue[J]. ACTA METALLURGICA SINICA,2003,39(6):613-616.
APA	Guan, H,Li, J,Wei, XJ,Han, EH,&Ke, W.(2003).Effects of environment on the overload behavior of fatigue.ACTA METALLURGICA SINICA,39(6),613-616.
MLA	Guan, H,et al."Effects of environment on the overload behavior of fatigue".ACTA METALLURGICA SINICA 39.6(2003):613-616.