Superior fracture toughness with high yield strength in a high-Mn steel induced by heterogeneous grain structure

doi:10.1016/j.matdes.2022.111473

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Superior fracture toughness with high yield strength in a high-Mn steel induced by heterogeneous grain structure
	Zhang, Shengde 1,2; Yang, Muxin 2; Wu, Xiaolei 1,2; Yuan, Fuping 1,2
刊名	MATERIALS & DESIGN
	2023
卷号	225 页码:11
关键词	Heterogeneous grain structures Fracture toughness Strain hardening, Microband-induced plasticity Ductility Mn austenitic steels
ISSN号	0264-1275
DOI	10.1016/j.matdes.2022.111473
通讯作者	Yuan, Fuping(fpyuan@lnm.imech.ac.cn)
英文摘要	Heterogeneous grain structures were designed in a high Mn steel (Fe28Mn10Al1.00C), and the tensile properties and fracture toughness were investigated and compared with those for homogeneous structures. The heterogeneous grain structures display larger tensile ductility, stronger strain hardening and higher fracture toughness at the similar yield strength level. Hetero-deformation-induced hardening is found to play an important role in the heterogeneous grain structures, resulting in better mechanical properties. The size of plastic zone and the strain hardening capacity around the crack tip for the heterogeneous grain structures are found to be much larger/higher than those for the homogeneous grain structures at the same level of yield strength, resulting in better fracture toughness. High density of geometrically necessary dislocations and grain refinement are induced at the adjacent area of the main crack path, and numerous microvoids are also observed besides the main crack for the heterogeneous grain structures, resulting in more energy dissipation for higher fracture toughness. The deformation mechanisms around the crack tip are highly dependent on the magnitude of plastic strain and the grain size. The observed higher fracture toughness in the heterogeneous grain structures can be partly attributed to the formation of microbands. (c) 2022 The Authors. Published by Elsevier Ltd. 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	NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; National Key R&D Program of China[2017YFA0204402] ; National Natural Science Foundation of China[52192591] ; National Natural Science Foundation of China[11790293]
WOS关键词	STRAIN-HARDENING MECHANISMS ; HIGH-TENSILE DUCTILITY ; INDUCED PLASTICITY ; MICROSTRUCTURE EVOLUTION ; DEFORMATION ; BEHAVIOR ; ALLOY ; STATE
WOS研究方向	Materials Science
语种	英语
WOS记录号	WOS:000899026100004
资助机构	NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; National Key R&D Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/91451]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Yuan, Fuping
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Shengde,Yang, Muxin,Wu, Xiaolei,et al. Superior fracture toughness with high yield strength in a high-Mn steel induced by heterogeneous grain structure[J]. MATERIALS & DESIGN,2023,225:11.
APA	Zhang, Shengde,Yang, Muxin,Wu, Xiaolei,&Yuan, Fuping.(2023).Superior fracture toughness with high yield strength in a high-Mn steel induced by heterogeneous grain structure.MATERIALS & DESIGN,225,11.
MLA	Zhang, Shengde,et al."Superior fracture toughness with high yield strength in a high-Mn steel induced by heterogeneous grain structure".MATERIALS & DESIGN 225(2023):11.