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

IMR OpenIR

	Hydrogen induced cracking behaviors of X70 pipeline steel and its welds under electrochemical charging
	Zhang, YR ; Dong, CF ; Li, XG ; Rui, XL ; Zhou, HR
通讯作者	Zhang, YR(eddie_zh00@sina.com)
	2006-05-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	42 期号:5 页码:521-527
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.
关键词	X70 pipeline steel hydrogen induced cracking hydrogen permeation weld
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000237981200015
出版者	SCIENCE CHINA PRESS
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/321006/85431
专题	中国科学院金属研究所
通讯作者	Zhang, YR
作者单位	1.Univ Sci & Technol Beijing, Coll Mat Sci & Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, 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.