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RESEARCH ON THE CARBIDE PRECIPITATION AND CHROMIUM DEPLETION IN THE GRAIN BOUNDARY OF ALLOY 690 CONTAINING DIFFERENT CONTENTS OF NITROGEN
Ma Yingche; Li Shuo; Hao Xianchao; Zha Xiangdong; Gao Ming; Liu Kui
Corresponding AuthorMa Yingche(ycma@imr.ac.cn)
2016-08-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume52Issue:8Pages:980-986
AbstractNickel-based alloy Inconel 690 (hereinafter called alloy 690) is currently replacing alloy 600 as steam generator tubes in pressurized water nuclear reactors, owing to its excellent resistance to intergranular stress corrosion cracking (IGSCC) and good mechanical properties. The carbide precipitation is a major microstructural characteristic during heat treatment of stainless steels and nickel-based alloys. The carbide precipitation and chromium depletion in the grain boundary of alloy 690 were investigated. The grain size and carbide of alloy 690 with 0.001% and 0.03% (mass fraction) nitrogen contents were observed and analyzed. The extent of chromium depletion in the vicinity of grain boundaries was quantitatively determined as a function of thermal treatment time. The solution treatment of the samples was at 1080 degrees C for 10 min, and then the samples were thermally treated at 715 degrees C for 1 similar to 25 h. The results show that the nitrogen addition decreases the intergranular carbide density and the average carbide length but increases its distance. The level of chromium in the depleted regions in alloy 690 with 0.03%N is higher than that with 0.001%N. This is attributed to the beneficial role of nitrogen addition against grain growth and sensitization.
Keywordalloy 690 N carbide precipitation chromium depletion
Funding OrganizationChinese Academy of Scicences Innovation Foundation
DOI10.11900/0412.1961.2015.00636
Indexed BySCI
Language英语
Funding ProjectChinese Academy of Scicences Innovation Foundation[CXJJ-14-M44]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000381541900011
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/321006/122775
Collection中国科学院金属研究所
Corresponding AuthorMa Yingche
AffiliationChinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Ma Yingche,Li Shuo,Hao Xianchao,et al. RESEARCH ON THE CARBIDE PRECIPITATION AND CHROMIUM DEPLETION IN THE GRAIN BOUNDARY OF ALLOY 690 CONTAINING DIFFERENT CONTENTS OF NITROGEN[J]. ACTA METALLURGICA SINICA,2016,52(8):980-986.
APA Ma Yingche,Li Shuo,Hao Xianchao,Zha Xiangdong,Gao Ming,&Liu Kui.(2016).RESEARCH ON THE CARBIDE PRECIPITATION AND CHROMIUM DEPLETION IN THE GRAIN BOUNDARY OF ALLOY 690 CONTAINING DIFFERENT CONTENTS OF NITROGEN.ACTA METALLURGICA SINICA,52(8),980-986.
MLA Ma Yingche,et al."RESEARCH ON THE CARBIDE PRECIPITATION AND CHROMIUM DEPLETION IN THE GRAIN BOUNDARY OF ALLOY 690 CONTAINING DIFFERENT CONTENTS OF NITROGEN".ACTA METALLURGICA SINICA 52.8(2016):980-986.
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