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Effect of inhomogeneity on the microstructural evolution and mechanical behaviour of a vanadium-containing Fe-Cr-Ni-Mo weld metal
Sun, Jian1,2; Lu, Shanping1,2
Corresponding AuthorLu, Shanping(shplu@imr.ac.cn)
2021-03-04
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume806Pages:15
AbstractPrecipitation and mechanical behavior of a novel Fe-Cr-Ni-Mo weld metal containing different V contents in as-welded (AW) and post-weld heat treatment (PWHT) conditions were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), and atom probe tomography (APT). The results showed that the dislocation density increased significantly with an increase in the V content for PWHT weld metal owing to a higher volume fraction of the discrete nano-scale MC carbides pinning the dislocations. Therefore, strengthening contributions were mainly attributed to the precipitation strengthening and dislocation strengthening for PWHT weld metals containing V. The segregation of strong carbide forming elements (V and Mo) at inter-dendritic (ID) region, which was produced by solute redistribution during solidification, exhibited a major contributor to the continuous diffusion of C element from dendrite core (DC) to ID region during PWHT, so-called uphill diffusion. Also, TEM and APT showed that an inhomogeneous distribution of carbides owing to the V and Mo elemental segregation as well as the higher density dislocation at ID segregation, exhibiting that nano-scale M2C or MC carbides were mainly precipitated in ID region whilst large M3C carbides were mainly developed in DC region for PWHT weld metal.
KeywordWelding Carbides Transmission electron microscopy Atom probe tomography Inter-dendritic segregation
Funding OrganizationMajor R&D Project of Liaoning Province ; National Key R&D Program of China ; Natural Science Foundation of Liaoning Province
DOI10.1016/j.msea.2021.140758
Indexed BySCI
Language英语
Funding ProjectMajor R&D Project of Liaoning Province[2020JH1/10100001] ; National Key R&D Program of China[2016YFB0300601] ; Natural Science Foundation of Liaoning Province[2019JH3/30100039]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000620945600002
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/160899
Collection中国科学院金属研究所
Corresponding AuthorLu, Shanping
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Sun, Jian,Lu, Shanping. Effect of inhomogeneity on the microstructural evolution and mechanical behaviour of a vanadium-containing Fe-Cr-Ni-Mo weld metal[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,806:15.
APA Sun, Jian,&Lu, Shanping.(2021).Effect of inhomogeneity on the microstructural evolution and mechanical behaviour of a vanadium-containing Fe-Cr-Ni-Mo weld metal.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,806,15.
MLA Sun, Jian,et al."Effect of inhomogeneity on the microstructural evolution and mechanical behaviour of a vanadium-containing Fe-Cr-Ni-Mo weld metal".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 806(2021):15.
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