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Microstructure of a domestically fabricated dissimilar metal weld joint (SA508-52M-309L-CF8A) in nuclear power plant
Ming, Hongliang; Zhang, Zhiming; Wang, Jianqiu; Han, En-Hou
2019-02-01
Source PublicationMATERIALS CHARACTERIZATION
ISSN1044-5803
Volume148Pages:100-115
AbstractA dissimilar metal weld joint (DMWJ) between low alloy steel and casted duplex stainless steel (CDSS) prepared by automatic multi-pass gas tungsten arc welding (GTAW) with 309L and 52M filler metals is studied by optical microscopy, scanning electron microscopy (with electron back scattering diffraction and energy dispersive X-ray spectroscopy systems), scanning probe microscope techniques and micro-hardness testing. Carbon-depleted zones and microstructure transitions are found in the SA508 heat affected zone (HAZ). Type-I and type-II boundaries exist in 52Mb at some places near the SA508-52Mb interface. The ferrite at the unmixed zone and the zone adjacent to the 309L-CF8A interface (within similar to 300 mu m) changes to a lamellar structure with intermixed ferrite and austenite strips during the buttering process. Epitaxial growth and higher residual strain level are found at the 52Mw-52Mb, 52Mw-309L and 309L-CF8A interface areas. The micro-hardness distribution across the dissimilar metal weld joint is related to the complex chemical composition distribution and the microstructure transition, which in turn made it non-uniform and complicated.
KeywordDissimilar metal weld joint GTAW Microstructure Duplex stainless steel Nuclear power plant
Indexed BySCI
Language英语
WOS IDWOS:000458228100012
PublisherELSEVIER SCIENCE INC
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81402
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Ming, Hongliang,Zhang, Zhiming,Wang, Jianqiu,et al. Microstructure of a domestically fabricated dissimilar metal weld joint (SA508-52M-309L-CF8A) in nuclear power plant[J]. MATERIALS CHARACTERIZATION,2019,148:100-115.
APA Ming, Hongliang,Zhang, Zhiming,Wang, Jianqiu,&Han, En-Hou.(2019).Microstructure of a domestically fabricated dissimilar metal weld joint (SA508-52M-309L-CF8A) in nuclear power plant.MATERIALS CHARACTERIZATION,148,100-115.
MLA Ming, Hongliang,et al."Microstructure of a domestically fabricated dissimilar metal weld joint (SA508-52M-309L-CF8A) in nuclear power plant".MATERIALS CHARACTERIZATION 148(2019):100-115.
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