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MICROSTRUCTURE NEAR SCRATCH ON ALLOY 690TT AND STRESS CORROSION INDUCED BY SCRATCHING
Meng Fanjiang1; Wang Jianqiu1; Han En-Hou1; Shoji, Testuo2; Ke Wei1
Corresponding AuthorWang Jianqiu(wangjianqiu@imr.ac.cn)
2011-07-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume47Issue:7Pages:839-846
AbstractThe microstructure and stress corrosion cracking (SCC) behavior of scratched zone on alloy 690TT were studied by using rnicrohardness, TEM, EBSD-OIM and immersion experiment in caustic solution. It was found that a deformed hardening layer with a dimension range of 100 Am was produced near the scratch. TEM and EBSD-OIM observations showed that the grains at shallow surface of scratch groove were refined to nano size. SCC tests for scratched alloy 690TT were performed in caustic solution at high temperature with or without addition of lead oxides. The results showed that SCC cracks initiated and propagated at scratch banks and scratch grooves. Grain boundaries, twin boundaries deformed and microcracks produced during scratching process are preferential sites for SCC. The oxide films formed on scratch groove were loosed by lead. The SCC crack length increased with increase of lead content. Scratched alloy 690TT is susceptible to SCC.
KeywordNi base alloy 690 surface scratch microstructure stress corrosion cracking
Funding OrganizationNational Basic Research Program of China
DOI10.3724/SP.J.1037.2011.00213
Indexed BySCI
Language英语
Funding ProjectNational Basic Research Program of China[2006CB605000]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000294980700012
PublisherSCIENCE PRESS
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/105953
Collection中国科学院金属研究所
Corresponding AuthorWang Jianqiu
Affiliation1.Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
2.Tohoku Univ, Fracture & Reliabil Res Inst, Sendai, Miyagi 9808579, Japan
Recommended Citation
GB/T 7714
Meng Fanjiang,Wang Jianqiu,Han En-Hou,et al. MICROSTRUCTURE NEAR SCRATCH ON ALLOY 690TT AND STRESS CORROSION INDUCED BY SCRATCHING[J]. ACTA METALLURGICA SINICA,2011,47(7):839-846.
APA Meng Fanjiang,Wang Jianqiu,Han En-Hou,Shoji, Testuo,&Ke Wei.(2011).MICROSTRUCTURE NEAR SCRATCH ON ALLOY 690TT AND STRESS CORROSION INDUCED BY SCRATCHING.ACTA METALLURGICA SINICA,47(7),839-846.
MLA Meng Fanjiang,et al."MICROSTRUCTURE NEAR SCRATCH ON ALLOY 690TT AND STRESS CORROSION INDUCED BY SCRATCHING".ACTA METALLURGICA SINICA 47.7(2011):839-846.
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