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Effect of matrix carbon content and lath martensite microstructures on the tempered precipitates and impact toughness of a medium-carbon low-alloy steel
Sun, Chen1,2; Fu, Pai-Xian1,2; Ma, Xiao-Ping1,2; Liu, Hang-Hang1,2; Du, Ning-Yu1,2; Cao, Yan-Fei1,2; Liu, Hong-Wei1,2; Li, Dian-Zhong1,2
Corresponding AuthorFu, Pai-Xian(pxfu@imr.ac.cn) ; Li, Dian-Zhong(dzli@imr.ac.cn)
2020-07-01
Source PublicationJOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN2238-7854
Volume9Issue:4Pages:7701-7710
AbstractDifferent austenitizing temperatures were used to obtain medium-carbon low-alloy (MCLA) steels with different initial states of tempering, including lath martensite microstructures and matrix carbon contents. The effects of these factors on the tempered carbides and impact toughness of the MCLA steels were investigated via optical microscopy (OM), scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results showed that the matrix carbon content and lath martensite substructure sizes could be effectively controlled by the austenitizing temperature. The morphologies of the tempered carbides precipitated at the boundaries were controlled by both the matrix carbon content and the lath marten site substructure sizes. Higher matrix carbon content and boundary densities increased the nucleation rate and promoted the formation of spherical carbides. The spheroidization of carbides was conducive to improving the impact toughness. However, the decrease in the density of high-angle grain boundaries and the appearance of long strip-shaped carbides drastically reduced the impact toughness. (C) 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
KeywordMedium-carbon low-alloy steel Matrix carbon content Lath martensite Carbides Impact toughness
Funding OrganizationNational Natural Science Foundation ; Project to Strengthen Industrial Development at the Grass-roots Level ; Independent & Controllable Manufacturing of Advanced Bearing ; Innovation Project ofthe Cutting-edge Basic Research and Key Technology by SYNL ; Young Talent Project by SYNL ; China Postdoctoral Science Foundation
DOI10.1016/j.jmrt.2020.05.002
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation[51701225] ; Project to Strengthen Industrial Development at the Grass-roots Level[TC190A4DA/35] ; Independent & Controllable Manufacturing of Advanced Bearing ; Innovation Project ofthe Cutting-edge Basic Research and Key Technology by SYNL[L2019R36] ; Young Talent Project by SYNL[L2019F33] ; China Postdoctoral Science Foundation[2019M661153]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000556875600007
PublisherELSEVIER
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140116
Collection中国科学院金属研究所
Corresponding AuthorFu, Pai-Xian; Li, Dian-Zhong
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 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, Chen,Fu, Pai-Xian,Ma, Xiao-Ping,et al. Effect of matrix carbon content and lath martensite microstructures on the tempered precipitates and impact toughness of a medium-carbon low-alloy steel[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2020,9(4):7701-7710.
APA Sun, Chen.,Fu, Pai-Xian.,Ma, Xiao-Ping.,Liu, Hang-Hang.,Du, Ning-Yu.,...&Li, Dian-Zhong.(2020).Effect of matrix carbon content and lath martensite microstructures on the tempered precipitates and impact toughness of a medium-carbon low-alloy steel.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,9(4),7701-7710.
MLA Sun, Chen,et al."Effect of matrix carbon content and lath martensite microstructures on the tempered precipitates and impact toughness of a medium-carbon low-alloy steel".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 9.4(2020):7701-7710.
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