In situ investigation of the fracture of primary carbides and its mechanism in M50 steel

doi:10.1016/j.matchar.2022.111822

CORC > 金属研究所 > 中国科学院金属研究所

	In situ investigation of the fracture of primary carbides and its mechanism in M50 steel
	Du, Ningyu 1,2; Liu, Hanghang 2; Cao, Yanfei 2; Fu, Paixian 2; Sun, Chen 2; Liu, Hongwei 2; Li, Dianzhong 2
刊名	MATERIALS CHARACTERIZATION
	2022-04-01
卷号	186 页码:11
关键词	Bearing steel Primary carbides Fracture X-ray microtomography MC
ISSN号	1044-5803
DOI	10.1016/j.matchar.2022.111822
通讯作者	Liu, Hongwei(hwliu@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn)
英文摘要	The tensile crack initiation and propagation of M50 bearing steel were investigated. It is found that the primary carbides were fractured during the tensile test by in situ SEM, while decohesion of the carbide/matrix interface was hardly observed. In order to capture the initial tensile crack, quasi-in situ X-ray microtomography was performed, indicating that the earliest crack was formed from the broken interior carbides. This indicates that multiple cracks already existed in the matrix when they were observed on the sample surface. Electron backscattered diffraction (EBSD) and the finite element method (FEM) were applied to analyze the fracture behavior of carbide particles. The fracture of carbide particle is produced by the incompatible deformation between the matrix and carbides. The frequency of carbide fracture was found to be related with its fracture strength, size and shape. M2C carbide fracture was more easily broken than the MC carbide during tensile test. In addition, the long axis of most M2C carbides is approximately parallel to its (0001) plane and normal to tensile stress, leading to cracking more easily. Finally, a suggestion of adding pre-deformation is proposed to make M2C carbides broken sufficiently and further refine the primary carbides.
资助项目	Key-Area Research and Develop-ment Program of Guangdong Province, China[2020B010184001] ; Natural Science Foundation of China[52031013] ; National Key Research and Development Program[2018YFA0702901] ; National Natural Science Foundation of China[51701225] ; National Science and Technology Major Project[2017-VII-0008-0101] ; National Science and Technology Major Project[TC190A4DA/35] ; IMR Innovation Fund[2022-PY09]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000809940400003
资助机构	Key-Area Research and Develop-ment Program of Guangdong Province, China ; Natural Science Foundation of China ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Science and Technology Major Project ; IMR Innovation Fund
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174780]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Hongwei; Li, Dianzhong
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, 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	Du, Ningyu,Liu, Hanghang,Cao, Yanfei,et al. In situ investigation of the fracture of primary carbides and its mechanism in M50 steel[J]. MATERIALS CHARACTERIZATION,2022,186:11.
APA	Du, Ningyu.,Liu, Hanghang.,Cao, Yanfei.,Fu, Paixian.,Sun, Chen.,...&Li, Dianzhong.(2022).In situ investigation of the fracture of primary carbides and its mechanism in M50 steel.MATERIALS CHARACTERIZATION,186,11.
MLA	Du, Ningyu,et al."In situ investigation of the fracture of primary carbides and its mechanism in M50 steel".MATERIALS CHARACTERIZATION 186(2022):11.