Crack growth retardation of single overload for A537 steel in a 3.5% NaCl solution under cathodic potential and free corrosion condition

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	Crack growth retardation of single overload for A537 steel in a 3.5% NaCl solution under cathodic potential and free corrosion condition
	X. J. Wei; J. Li; W. Ke
	1998
发表期刊	International Journal of Fatigue
ISSN	0142-1123
卷号	20 期号:3 页码:225-231
摘要	Single peak overload retardation of corrosion fatigue crack growth under constant Delta K control was studied for A537 steel in air and in a 3.5% NaCl solution at the applied cathodic potential of 1400 mV(SCE) and in free corrosion condition. The crack closure behaviour was examined by the speckle interferometry technique at different stages of fatigue crack propagation. Scanning electron microscopy was used to observe the morphologies of fracture surface. The experimental results showed that, in all conditions, overload retardation occurred and the retarded propagation distances of crack were longer than the plastic zone size caused by overload at the crack tip. In air or in 3.5% NaCl at the cathodic potential, delayed retardation occurred after applying a peak overload, the crack growth consisted of three stages: crack extension due to overload; decelerating in crack growth; and resumption of crack growth rate. Immediate retardation occurred when specimens were tested in a 3.5% NaCl solution in free corrosion conditions. Crack extension due to overload was not observed. Under both cathodic polarization and free corrosion condition, the overload retardation phenomena were not as obvious as that in air. The retarded propagation distance and the retardation degree were both smaller than those in air. The mechanisms for overload retardation of corrosion fatigue crack growth under the control of hydrogen embrittlement and anodic dissolution were discussed on the basis of analyses of crack closure, residual compressive stress and crack tip blunting. (C) 1998 Elsevier Science Ltd.
部门归属	chinese acad sci, state key lab corros & protect, inst corros & protect met, shenyang 110015, peoples r china.;wei, xj (reprint author), chinese acad sci, state key lab corros & protect, inst corros & protect met, 62 wencui rd, shenyang 110015, peoples r china
关键词	Corrosion Fatigue Crack Propagation Overload Crack Closure Fatigue
URL	查看原文
WOS记录号	WOS:000073601900004
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37818
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. J. Wei,J. Li,W. Ke. Crack growth retardation of single overload for A537 steel in a 3.5% NaCl solution under cathodic potential and free corrosion condition[J]. International Journal of Fatigue,1998,20(3):225-231.
APA	X. J. Wei,J. Li,&W. Ke.(1998).Crack growth retardation of single overload for A537 steel in a 3.5% NaCl solution under cathodic potential and free corrosion condition.International Journal of Fatigue,20(3),225-231.
MLA	X. J. Wei,et al."Crack growth retardation of single overload for A537 steel in a 3.5% NaCl solution under cathodic potential and free corrosion condition".International Journal of Fatigue 20.3(1998):225-231.