Extraordinary fracture toughness in nickel induced by heterogeneous grain structure

doi:10.1016/j.msea.2021.142313

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

	Extraordinary fracture toughness in nickel induced by heterogeneous grain structure
	Zhang SD(张胜德)1,2; Yang MX(杨沐鑫)2; Yuan FP(袁福平)1,2; Zhou LL(周玲玲)1,2; Wu XL(武晓雷)1,2
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2022-01-07
卷号	830 页码:11
关键词	Heterogeneous grain structures Fracture toughness Ductility Strain hardening J-R curves
ISSN号	0921-5093
DOI	10.1016/j.msea.2021.142313
通讯作者	Yuan, Fuping(fpyuan@lnm.imech.ac.cn)
英文摘要	The tensile properties and fracture toughness of both heterogeneous grain structures and homogeneous structures in pure nickel have been investigated and compared. The heterogeneous samples were found to show much larger uniform elongation and much higher fracture toughness at the similar level of yield strength, compared to the homogeneous structures. The enhanced ductility/toughness can be attributed to the stronger heterodeformation-induced hardening for the heterogeneous structures. In sharp contrast to the cleavage-like and brittle fracture behavior in the homogeneous hot-extruded and cold-rolled samples, the fracture process in the heterogeneous structures shows ductile fracture by microvoid coalescence and dimples. The crack path in the heterogeneous structures was found to display a gourd shape, which can result in longer crack length and dissipate more energy for better fracture toughness. Hardening is obvious across a much larger area around the crack tip in the heterogeneous structures as compared to the homogeneous structures, indicating a much larger plastic zone for the heterogeneous structures. The strong strain hardening at the crack tip was found to be induced by the grain refinement of the coarse grains in the heterogeneous structures, resulting in extraordinary fracture toughness.
分类号	一类
资助项目	National Key R&D Program of China[2017YFA0204402] ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; National Natural Science Foundation of China[52071326] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503]
WOS关键词	AUSTENITIC STAINLESS-STEEL ; BULK NANOCRYSTALLINE CU ; HIGH-TENSILE DUCTILITY ; MEDIUM-ENTROPY ALLOY ; IMPACT TOUGHNESS ; CRACK-TIP ; NI-W ; DEFORMATION ; STRENGTH ; PLASTICITY
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000721680100001
资助机构	National Key R&D Program of China ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
其他责任者	Yuan, Fuping
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/88019]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Zhang SD,Yang MX,Yuan FP,et al. Extraordinary fracture toughness in nickel induced by heterogeneous grain structure[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,830:11.
APA	张胜德,杨沐鑫,袁福平,周玲玲,&武晓雷.(2022).Extraordinary fracture toughness in nickel induced by heterogeneous grain structure.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,830,11.
MLA	张胜德,et al."Extraordinary fracture toughness in nickel induced by heterogeneous grain structure".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 830(2022):11.