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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, Yong1; Liu, Zhiyong1,2; Fan, Endian1; Cui, Zhongyu3; Zhao, Jinbin1,4
2020-10-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume54Pages:119-131
AbstractThe 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.
KeywordLow alloy steel Stress state Cathodic potential Crack tip environment Crack growth behaviour
DOI10.1016/j.jmst.2020.04.034
Indexed BySCI
Language英语
Funding ProjectOpen 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 Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000545310500013
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/167922
Collection海洋环境腐蚀与与生物污损重点实验室
Corresponding AuthorLiu, Zhiyong
Affiliation1.Univ Sci & Technol Beijing, Corros & Protect Ctr, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Shandong Key Lab Corros Sci, Qingdao 266071, Peoples R China
3.Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China
4.Nanjing Iron & Steel United Co Ltd, Jiangsu Key Lab Premium Steel Mat, Nanjing 210035, Peoples R China
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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.
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