Hydrogen induced cracking behaviors of X70 pipeline steel and its welds under electrochemical charging

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	Hydrogen induced cracking behaviors of X70 pipeline steel and its welds under electrochemical charging
	Zhang, YR ; Dong, CF ; Li, XG ; Rui, XL ; Zhou, HR
刊名	ACTA METALLURGICA SINICA
	2006-05-11
卷号	42 期号:5 页码:521-527
关键词	X70 pipeline steel hydrogen induced cracking hydrogen permeation weld
ISSN号	0412-1961
通讯作者	Zhang, YR(eddie_zh00@sina.com)
英文摘要	The hydrogen induced cracking (HIC) of X70 pipeline steel was studied in H2SO4 solutions with different concentrations by means of electrochemical charging. Larger current densities, longer charging time and lower pH values of solution would promote the hydrogen atoms to enter into X70 steel. Non-metallic inclusions such as nitrides and oxides play different roles in HIC of X70 steel. Microscopic observation showed that there is no dependent relation between cracks induced by hydrogen and the inclusions of nitrides. Otherwise, the oxides of magnesium, aluminum and calcium etc are more harmful as the sources of hydrogen induced cracks. According to the results of hydrogen permeation test, the effective diffusivity (D-eff) of hydrogen at room temperature is 3.34 x 10(-9) cm(2)/s. Tensile specimens of X70 steel and welds showed severe plasticity loss after hydrogen charging, while the welds have lower plasticity than that of X70 base metal.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000237981200015
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/85430]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, YR
作者单位	1.Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China 2.Univ Sci & Technol Beijing, Coll Mat Sci & Engn, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Zhang, YR,Dong, CF,Li, XG,et al. Hydrogen induced cracking behaviors of X70 pipeline steel and its welds under electrochemical charging[J]. ACTA METALLURGICA SINICA,2006,42(5):521-527.
APA	Zhang, YR,Dong, CF,Li, XG,Rui, XL,&Zhou, HR.(2006).Hydrogen induced cracking behaviors of X70 pipeline steel and its welds under electrochemical charging.ACTA METALLURGICA SINICA,42(5),521-527.
MLA	Zhang, YR,et al."Hydrogen induced cracking behaviors of X70 pipeline steel and its welds under electrochemical charging".ACTA METALLURGICA SINICA 42.5(2006):521-527.