IMECH-IR  > 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)1; Yuan FP(袁福平)1,2; Zhou LL(周玲玲)1,2; Wu XL(武晓雷)1,2
Corresponding AuthorYuan, Fuping(fpyuan@lnm.imech.ac.cn)
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
2022-01-07
Volume830Pages:11
ISSN0921-5093
AbstractThe 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.
KeywordHeterogeneous grain structures Fracture toughness Ductility Strain hardening J-R curves
DOI10.1016/j.msea.2021.142313
Indexed BySCI ; EI
Language英语
WOS IDWOS:000721680100001
WOS KeywordAUSTENITIC STAINLESS-STEEL ; BULK NANOCRYSTALLINE CU ; HIGH-TENSILE DUCTILITY ; MEDIUM-ENTROPY ALLOY ; IMPACT TOUGHNESS ; CRACK-TIP ; NI-W ; DEFORMATION ; STRENGTH ; PLASTICITY
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding ProjectNational 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]
Funding OrganizationNational 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
Classification一类
Ranking1
ContributorYuan, Fuping
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/88020
Collection非线性力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
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.
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