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Influence of chromium content on the bainite transformation nucleation mechanism and the properties of 800 MPa grade low carbon bainite weld deposited metal
Liu, Jingwu1,2; Sun, Jian1; Wei, Shitong1; Lu, Shanping1
Corresponding AuthorLu, Shanping(shplu@imr.ac.cn)
2022-04-18
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume840Pages:12
AbstractThe strength-toughness trade-off theory is always the focus in the field of high-strength structure materials. Especially for the deposited metals, the matching of high-strength and accepted toughness is difficult to achieve. In this work, the nucleation mechanism of bainite ferrite (BF) and impact toughness were investigated systematically for the deposited metals with different chromium (Cr) contents (0.3 wt %, 0.6 wt % and 1.0 wt %). The microstructure of the deposited metals with different Cr contents was analyzed by a combination of multiple analytical tools: scanning electron microscope, transmission electron microscope and electron backscatter diffraction. The results revealed that autocatalytic nucleation during the bainite transformation had a significant effect on the microstructure evolution and the impact toughness due to the complex crystallographic orientation of BF. As the Cr content increased, the autocatalytic effect became weaker, and the selection tendency of variants enhanced. The autocatalytic nucleation during bainite transformation was primarily controlled by the transformation kinetics of BF. Enough space at the side of the existing BF resulted from the low transformation speed of bainite was necessary for the occurrence of autocatalytic nucleation. In addition, toughness decreased as autocatalytic nucleation weakened due to the coarsening of microstructure and appearance of coalesced bainite in the microstructure of deposited metal. The interlaced BF arrangement could bring a better combination of high strength and toughness for the deposited metals.
KeywordChromium content Impact toughness Autocatalytic nucleation Coalesced bainite Deposited metal
Funding Organizationmajor R&D Project of Liaoning Province ; National Science Foundation of Liaoning Province ; Innovation Project of She-nyang National Laboratory for materials science ; National Natural Science Foundation of China
DOI10.1016/j.msea.2022.142893
Indexed BySCI
Language英语
Funding Projectmajor R&D Project of Liaoning Province[2020JH1/10100001] ; National Science Foundation of Liaoning Province[2019JH3/30100039] ; Innovation Project of She-nyang National Laboratory for materials science ; National Natural Science Foundation of China ; [52101060]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000776440800002
PublisherELSEVIER SCIENCE SA
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/172985
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
Liu, Jingwu,Sun, Jian,Wei, Shitong,et al. Influence of chromium content on the bainite transformation nucleation mechanism and the properties of 800 MPa grade low carbon bainite weld deposited metal[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,840:12.
APA Liu, Jingwu,Sun, Jian,Wei, Shitong,&Lu, Shanping.(2022).Influence of chromium content on the bainite transformation nucleation mechanism and the properties of 800 MPa grade low carbon bainite weld deposited metal.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,840,12.
MLA Liu, Jingwu,et al."Influence of chromium content on the bainite transformation nucleation mechanism and the properties of 800 MPa grade low carbon bainite weld deposited metal".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 840(2022):12.
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