Role of microstructure on sulfide stress cracking of oil and gas pipeline steels

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	Role of microstructure on sulfide stress cracking of oil and gas pipeline steels; Role of microstructure on sulfide stress cracking of oil and gas pipeline steels
	M. C. Zhao; B. Tang; Y. Y. Shan; K. Yang
	2003 ; 2003
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science ; Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623 ; 1073-5623
卷号	34A 期号:5 页码:1089-1096
摘要	Sulfide stress cracking (SSC) behavior of three microstructures, i.e., ferritic-pearlitic microstructure, ultrafine ferrite microstructure, and acicular ferrite dominated microstructure, was investigated using the bent-beam test in aqueous hydrogen sulfide (H2S) environments. The critical stress (Sc) values of these three microstructures were determined experimentally to be 1008, 1190, and more than 1260 MPa, respectively. As a result, the acicular ferrite-dominated microstructure possessed the best SSC resistance, the ultrafine ferrite microstructure was in a second position, and the ferritic-pearlitic microstructure was relatively the worst. It was analyzed that hydrogen embrittlement (HE) was the main failure mechanism in SSC cracking for high-strength pipeline steels, and preferential hydrogen accumulation within the plastic zone of the main crack tip accounted for the exhibited embrittlement. It was remarkable that the strength values of pipeline steels were not the only factor to determine their SSC susceptibilities. Microstructure played an important role in the SSC initiation and propagation of pipeline steels. In particular, both the fine dispersed precipitations of carbonitrides and the high-density tangled dislocations in acicular ferrite, which behaved as the hydrogen traps, should be attributed to the optimal SSC resistance of pipeline steels.; Sulfide stress cracking (SSC) behavior of three microstructures, i.e., ferritic-pearlitic microstructure, ultrafine ferrite microstructure, and acicular ferrite dominated microstructure, was investigated using the bent-beam test in aqueous hydrogen sulfide (H2S) environments. The critical stress (Sc) values of these three microstructures were determined experimentally to be 1008, 1190, and more than 1260 MPa, respectively. As a result, the acicular ferrite-dominated microstructure possessed the best SSC resistance, the ultrafine ferrite microstructure was in a second position, and the ferritic-pearlitic microstructure was relatively the worst. It was analyzed that hydrogen embrittlement (HE) was the main failure mechanism in SSC cracking for high-strength pipeline steels, and preferential hydrogen accumulation within the plastic zone of the main crack tip accounted for the exhibited embrittlement. It was remarkable that the strength values of pipeline steels were not the only factor to determine their SSC susceptibilities. Microstructure played an important role in the SSC initiation and propagation of pipeline steels. In particular, both the fine dispersed precipitations of carbonitrides and the high-density tangled dislocations in acicular ferrite, which behaved as the hydrogen traps, should be attributed to the optimal SSC resistance of pipeline steels.
部门归属	chinese acad sci, inst met res, shenyang 110016, peoples r china.;zhao, mc (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china ; chinese acad sci, inst met res, shenyang 110016, peoples r china.;zhao, mc (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	Thermomechanical Control Process Thermomechanical Control Process Mechanical-properties Mechanical-properties Acicular Acicular Ferrite Ferrite Hydrogen Hydrogen Fracture Fracture Iron Iron Deformation Deformation
URL	查看原文 ; 查看原文
WOS记录号	WOS:000182676700005 ; WOS:000182676700005
引用统计	被引频次：55[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/321006/36200
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	M. C. Zhao,B. Tang,Y. Y. Shan,et al. Role of microstructure on sulfide stress cracking of oil and gas pipeline steels, Role of microstructure on sulfide stress cracking of oil and gas pipeline steels[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science, Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2003, 2003,34A, 34A(5):1089-1096, 1089-1096.
APA	M. C. Zhao,B. Tang,Y. Y. Shan,&K. Yang.(2003).Role of microstructure on sulfide stress cracking of oil and gas pipeline steels.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,34A(5),1089-1096.
MLA	M. C. Zhao,et al."Role of microstructure on sulfide stress cracking of oil and gas pipeline steels".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 34A.5(2003):1089-1096.