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Inter-zone constraint modifies the stress-strain response of the constituent layer in gradient structure

文献类型：期刊论文

作者Wang, Yanfei4; Zhu, Yuntian3; Wu XL(武晓雷)2; Wei, Yueguang1; Huang, Chongxiang4
刊名SCIENCE CHINA-MATERIALS
出版日期2021-07-19
页码10
关键词heterogeneous structure nanostructure stress-strain response strain bands strength and ductility
ISSN号2095-8226
DOI10.1007/s40843-021-1702-2
通讯作者Zhu, Yuntian(y.zhu@cityu.edu.hk) ; Huang, Chongxiang(chxhuang@scu.edu.cn)
英文摘要How an individual constituent zone behaves during the deformation of a heterostructured metallic material is a fundamental issue for understanding heterostructure deformation, but it remains a challenge to experimentally observe it. Here we report a study on the stress-strain behavior of the nanostructured gradient layer (NGL) in an integrated gradient specimen that consists of a coarse-grained (CG) central layer sandwiched between two NGLs. Constraint from the CG central layer led to the formation of dense and dispersed stable strain bands (SBs) in the NGL, which regained dislocation hardening after initial recovery and grain coarsening. Consequently, the NGL exhibited a transient plateau of flow stress after yielding, and then regained extra strain hardening to achieve excellent uniform elongation. These unique behaviors are dramatically different from those of a freestanding NGL, indicating a fundamentally different deformation principle that is intrinsic to heterostructures, i.e., inter-zone constraint modifies the constitutive behavior of constituent zones.
分类号二类/Q1
WOS关键词BACK STRESS ; MECHANICAL-PROPERTIES ; SHEAR BANDS ; DUCTILITY ; DEFORMATION ; STRENGTH ; PLASTICITY
资助项目National Natural Science Foundation of China (NSFC)[51931003] ; China Postdoctoral Science Foundation[2020M680223] ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; Chinese Academy of Sciences[XDB22040503] ; National Key R&D Program of China[2017YFA0204403]
WOS研究方向Materials Science
语种英语
WOS记录号WOS:000678060000001
资助机构National Natural Science Foundation of China (NSFC) ; China Postdoctoral Science Foundation ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; Chinese Academy of Sciences ; National Key R&D Program of China
其他责任者Zhu, Yuntian ; Huang, Chongxiang
源URL[http://dspace.imech.ac.cn/handle/311007/87161]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Peking Univ, Coll Engn, Dept Mech & Engn Sci, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
3.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China;
4.Sichuan Univ, Sch Aeronaut & Astronaut, Chengdu 610065, Peoples R China;
推荐引用方式
GB/T 7714		 Wang, Yanfei,Zhu, Yuntian,Wu XL,et al. Inter-zone constraint modifies the stress-strain response of the constituent layer in gradient structure[J]. SCIENCE CHINA-MATERIALS,2021:10.
APA Wang, Yanfei,Zhu, Yuntian,武晓雷,Wei, Yueguang,&Huang, Chongxiang.(2021).Inter-zone constraint modifies the stress-strain response of the constituent layer in gradient structure.SCIENCE CHINA-MATERIALS,10.
MLA Wang, Yanfei,et al."Inter-zone constraint modifies the stress-strain response of the constituent layer in gradient structure".SCIENCE CHINA-MATERIALS (2021):10.

入库方式： OAI收割

来源：力学研究所

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