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Extraordinary fracture toughness in nickel induced by heterogeneous grain structure

文献类型：期刊论文

作者Zhang, Shengde1,2; Yang, Muxin2; Yuan, Fuping1,2; Zhou, Lingling1,2; Wu, Xiaolei1,2; Wu XL(武晓雷); Zhang SD(张胜德); Yang MX(杨沐鑫); Yuan FP(袁福平)
刊名MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期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
DOI10.1016/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.
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
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
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
通讯作者Yuan, Fuping
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, Shengde,Yang, Muxin,Yuan, Fuping,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 Zhang, Shengde.,Yang, Muxin.,Yuan, Fuping.,Zhou, Lingling.,Wu, Xiaolei.,...&袁福平.(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 Zhang, Shengde,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.

入库方式： OAI收割

来源：力学研究所

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