The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawater

doi:10.1016/j.jmst.2020.04.034

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	The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawater
	Li, Yong 3; Liu, Zhiyong 1,3; Fan, Endian 3; Cui, Zhongyu 4; Zhao, Jinbin 2,3
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2020-10-01
卷号	54 页码:119-131
关键词	Low alloy steel Stress state Cathodic potential Crack tip environment Crack growth behaviour
ISSN号	1005-0302
DOI	10.1016/j.jmst.2020.04.034
英文摘要	The environment at crack tip and its effect on the crack growth behaviour of low alloy steel-E690 steel were studied at cathodic potentials in artificial seawater. The results showed that the micro environment at crack tip and crack growth behaviour were related to the electrochemical reactions at crack tip, which were affected by the stress state and applied potentials. The crack tip environment was acidified under cyclic loading, resulting from the crack tip anodic dissolution reaction and corresponding hydrolysis reaction. Because of the hydrogen evolution and the inhibited anodic dissolution inside the crack, the crack tip pH increases as the cathodic potential decreases. The effect of cathodic potentials on the electrochemical reactions caused the variation of the hydrogen content, which influenced the crack growth rate because the crack growth behaviour was controlled by hydrogen embrittlement mechanism. This resulted in a fact that with the negative decrease of potential, the crack growth rate first decreased and then increased, with the minimum rate at -0.75 V. And the crack growth path exhibited transgranular fracture. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	Open Fund of Shandong Key Laboratory of Corrosion Science[KLCS201909] ; National Natural Science Foundation of China[51771028] ; National Natural Science Foundation of China[51871024] ; National Natural Science Foundation of China[51601182]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000545310500013
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.qdio.ac.cn/handle/337002/167921]
专题	海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者	Liu, Zhiyong
作者单位	1.Chinese Acad Sci, Inst Oceanol, Shandong Key Lab Corros Sci, Qingdao 266071, Peoples R China 2.Nanjing Iron & Steel United Co Ltd, Jiangsu Key Lab Premium Steel Mat, Nanjing 210035, Peoples R China 3.Univ Sci & Technol Beijing, Corros & Protect Ctr, Beijing 100083, Peoples R China 4.Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China
推荐引用方式 GB/T 7714	Li, Yong,Liu, Zhiyong,Fan, Endian,et al. The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawater[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,54:119-131.
APA	Li, Yong,Liu, Zhiyong,Fan, Endian,Cui, Zhongyu,&Zhao, Jinbin.(2020).The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawater.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,54,119-131.
MLA	Li, Yong,et al."The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawater".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 54(2020):119-131.