Effect of matrix carbon content and lath martensite microstructures on the tempered precipitates and impact toughness of a medium-carbon low-alloy steel

doi:10.1016/j.jmrt.2020.05.002

CORC > 金属研究所 > 中国科学院金属研究所

	Effect of matrix carbon content and lath martensite microstructures on the tempered precipitates and impact toughness of a medium-carbon low-alloy steel
	Sun, Chen 1,2; Fu, Pai-Xian 1,2; Ma, Xiao-Ping 1,2; Liu, Hang-Hang 1,2; Du, Ning-Yu 1,2; Cao, Yan-Fei 1,2; Liu, Hong-Wei 1,2; Li, Dian-Zhong 1,2
刊名	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
	2020-07-01
卷号	9 期号:4 页码:7701-7710
关键词	Medium-carbon low-alloy steel Matrix carbon content Lath martensite Carbides Impact toughness
ISSN号	2238-7854
DOI	10.1016/j.jmrt.2020.05.002
通讯作者	Fu, Pai-Xian(pxfu@imr.ac.cn) ; Li, Dian-Zhong(dzli@imr.ac.cn)
英文摘要	Different 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/).
资助项目	National 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研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000556875600007
资助机构	National 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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140118]
专题	金属研究所_中国科学院金属研究所
通讯作者	Fu, Pai-Xian; Li, Dian-Zhong
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 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.