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

doi:10.1007/s40843-021-1702-2

IMECH-IR > 非线性力学国家重点实验室

	Inter-zone constraint modifies the stress-strain response of the constituent layer in gradient structure
	Wang, Yanfei 1; Zhu, Yuntian 2; Wu XL(武晓雷)3 ; Wei, Yueguang4 ; Huang, Chongxiang 1
通讯作者	Zhu, Yuntian(y.zhu@cityu.edu.hk) ; Huang, Chongxiang(chxhuang@scu.edu.cn)
发表期刊	SCIENCE CHINA-MATERIALS
	2021-07-19
页码	10
ISSN	2095-8226
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.
关键词	heterogeneous structure nanostructure stress-strain response strain bands strength and ductility
DOI	10.1007/s40843-021-1702-2
收录类别	SCI ; EI ; CSCD
语种	英语
WOS记录号	WOS:000678060000001
关键词[WOS]	BACK STRESS ; MECHANICAL-PROPERTIES ; SHEAR BANDS ; DUCTILITY ; DEFORMATION ; STRENGTH ; PLASTICITY
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
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]
项目资助者	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
论文分区	二类/Q1
力学所作者排名	3
RpAuthor	Zhu, Yuntian ; Huang, Chongxiang
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/87162
专题	非线性力学国家重点实验室
作者单位	1.Sichuan Univ, Sch Aeronaut & Astronaut, Chengdu 610065, Peoples R China; 2.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China; 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 4.Peking Univ, Coll Engn, Dept Mech & Engn Sci, Beijing 100871, 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.

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