Pit to crack transition in X-52 pipeline steel in near neutral pH environment Part 1-formation of blunt cracks from pits under cyclic loading

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	Pit to crack transition in X-52 pipeline steel in near neutral pH environment Part 1-formation of blunt cracks from pits under cyclic loading
	B. Y. Fang; R. L. Eadie; W. X. Chen; M. Elboujdaini
	2010
发表期刊	Corrosion Engineering Science and Technology
ISSN	1478-422X
卷号	45 期号:4 页码:302-312
摘要	Pipeline steel specimens that had been prepitted were cyclically loaded either in air at 0.7-7 Hz or in near neutral pH solutions sparged with 5% CO(2)/balance N(2) gas mixture at similar to 1 x 10(-4) Hz. The pit to crack transition on the radial transverse and axial transverse surfaces of typical X-52 pipeline steel was studied while varying the loading conditions and the solutions. Crack initiation in air was very difficult and took millions of cycles even under aggressive conditions. In contrast, the number of cycles required to initiate cracks in near neutral pH solutions was thousands of times smaller even under less aggressive loading. The pit geometry affected the cracking at the pits. Smaller pits were less likely to crack. If the depth to width aspect ratio was <0.5, then the pits were less likely to crack. In addition, pit to crack transition was related to the severity of the loading conditions, the solution and the microstructure. The blunt crack growth observed can be described as anodic dissolution of the plastically deformed highly stressed region at the base of the pit and the pit to crack transition can be fitted to a Weibull distribution.
部门归属	[fang, b. y.; eadie, r. l.; chen, w. x.] univ alberta, dept chem & mat engn, edmonton, ab t6g 2g6, canada. [fang, b. y.] chinese acad sci, inst met res, environm corros ctr, shenyang, peoples r china. [elboujdaini, m.] canmet mat technol lab, ottawa, on k1a 0g1, canada.;eadie, rl (reprint author), univ alberta, dept chem & mat engn, edmonton, ab t6g 2g6, canada;reg.eadie@ualberta.ca
关键词	Stress Corrosion Cracking Crack Initiation Pit To Crack Transition Near Neutral Ph Pipeline Steel Blunt Crack Stress-corrosion Cracking Anodic-dissolution Hydrogen Scc
URL	查看原文
WOS记录号	WOS:000280648300009
引用统计	被引频次：32[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/321006/31088
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	B. Y. Fang,R. L. Eadie,W. X. Chen,et al. Pit to crack transition in X-52 pipeline steel in near neutral pH environment Part 1-formation of blunt cracks from pits under cyclic loading[J]. Corrosion Engineering Science and Technology,2010,45(4):302-312.
APA	B. Y. Fang,R. L. Eadie,W. X. Chen,&M. Elboujdaini.(2010).Pit to crack transition in X-52 pipeline steel in near neutral pH environment Part 1-formation of blunt cracks from pits under cyclic loading.Corrosion Engineering Science and Technology,45(4),302-312.
MLA	B. Y. Fang,et al."Pit to crack transition in X-52 pipeline steel in near neutral pH environment Part 1-formation of blunt cracks from pits under cyclic loading".Corrosion Engineering Science and Technology 45.4(2010):302-312.