The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel

doi:10.3390/cryst10030232

CORC > 金属研究所 > 中国科学院金属研究所

	The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel
	Sun, Chen 1,2; Fu, Paixian 1; Liu, Hongwei 1; Liu, Hanghang 1; Du, Ningyu 1,2; Cao, Yanfei 1
刊名	CRYSTALS
	2020-03-01
卷号	10 期号:3 页码:12
关键词	medium-carbon low-alloy steel lath martensite effective grain size strength carbon content
ISSN号	2073-4352
DOI	10.3390/cryst10030232
通讯作者	Fu, Paixian(pxfu@imr.ac.cn) ; Cao, Yanfei(yfcao10s@imr.ac.cn)
英文摘要	Different austenitizing temperatures were used to obtain medium-carbon low-alloy (MCLA) martensitic steels with different lath martensite microstructures. The hierarchical microstructures of lath martensite were investigated by optical microscopy (OM), electron backscattering diffraction (EBSD), and transmission electron microscopy (TEM). The results show that with increasing the austenitizing temperature, the prior austenite grain size and block size increased, while the lath width decreased. Further, the yield strength and tensile strength increased due to the enhancement of the grain boundary strengthening. The fitting results reveal that only the relationship between lath width and strength followed the Hall-Petch formula of. Hence, we propose that lath width acts as the effective grain size (EGS) of strength in MCLA steel. In addition, the carbon content had a significant effect on the EGS of martensitic strength. In steels with lower carbon content, block size acted as the EGS, while, in steels with higher carbon content, the EGS changed to lath width. The effect of the Cottrell atmosphere around boundaries may be responsible for this change.
资助项目	National Natural Science Foundation of China[51701225] ; Project to Strengthen Industrial Development at the Grass-roots Level[TC190A4DA/35] ; Independent & Controllable Manufacturing of Advanced Bearing ; Innovation project of the 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	Crystallography ; Materials Science
语种	英语
出版者	MDPI
WOS记录号	WOS:000523512100031
资助机构	National Natural Science Foundation of China ; Project to Strengthen Industrial Development at the Grass-roots Level ; Independent & Controllable Manufacturing of Advanced Bearing ; Innovation project of the 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/321006/137941]
专题	金属研究所_中国科学院金属研究所
通讯作者	Fu, Paixian; Cao, Yanfei
作者单位	1.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, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Sun, Chen,Fu, Paixian,Liu, Hongwei,et al. The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel[J]. CRYSTALS,2020,10(3):12.
APA	Sun, Chen,Fu, Paixian,Liu, Hongwei,Liu, Hanghang,Du, Ningyu,&Cao, Yanfei.(2020).The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel.CRYSTALS,10(3),12.
MLA	Sun, Chen,et al."The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel".CRYSTALS 10.3(2020):12.