Plastic accommodation during tensile deformation of gradient structure

doi:10.1007/s40843-020-1545-2

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	Plastic accommodation during tensile deformation of gradient structure
	Wu XL(武晓雷)1,2 ; Yang MX(杨沐鑫)1 ; Li, Runguang 3; Jiang P(姜萍)1 ; Yuan FP(袁福平)1,2 ; Wang, Yandong 3; Zhu, Yuntian 5; Wei, Yueguang4
通讯作者	Wu, Xiaolei(xlwu@imech.ac.cn) ; Wang, Yandong(ydwang@bust.edu.cn) ; Wei, Yueguang(weiyg@pku.edu.cn)
发表期刊	SCIENCE CHINA-MATERIALS
	2021-01-05
页码	11
ISSN	2095-8226
摘要	Gradient structure (GS) possesses a typical trans-scale grain hierarchy with varying internal plastic stability, and the mutual plastic accommodation plays a crucial role in its superior strength-ductility combination. Using the in-situ synchrotron X-ray diffraction (XRD) during tensile loading, we measured lattice strains sequentially from the nanostructured (NS) surface layer to the central coarsegrained (CG) layer to elucidate when and how plastic accommodation occurs and evolves within the GS, along with their roles in plastic deformation and strain hardening. Throughout the tensile deformation, two types of plastic incompatibility occur in the GS. One is an extended elastoplastic transition due to layer-by-layer yielding. The other is strain localization and softening in the NS layer, in contrast with the stable plastic deformation in the CG layer. Plastic accommodation thus occurs concurrently and manifests as both an inter-layer and intra-layer change of stress state throughout tensile deformation. This produces different micromechanical responses between layers. Specifically, the NS layer initially experiences strain hardening followed by an elastoplastic deformation. The hetero-deformation induced hardening, along with forest hardening, facilitates a sustainable tensile strain in the NS layer, comparable to that in the CG layer.
关键词	gradient structure plastic accommodation strain hardening nanostructure ductility
DOI	10.1007/s40843-020-1545-2
收录类别	SCI ; EI ; CSCD
语种	英语
WOS记录号	WOS:000607019900002
关键词[WOS]	RANGE INTERNAL-STRESSES ; RESIDUAL-STRESS ; STRAIN GRADIENT ; YIELD-POINT ; IF STEEL ; DUCTILITY ; GRAIN ; MICROSTRUCTURE ; DISLOCATION ; STRENGTH
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
资助项目	Ministry of Science and Technology, China[2017YFA0204402] ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; National Natural Science Foundation of China[11972350] ; National Natural Science Foundation of China[11890680] ; Chinese Academy of Sciences[XDB22040503]
项目资助者	Ministry of Science and Technology, China ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; National Natural Science Foundation of China ; Chinese Academy of Sciences
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	Wu, Xiaolei ; Wang, Yandong ; Wei, Yueguang
引用统计	被引频次：29[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/311007/85922
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China; 4.Peking Univ, Dept Mech & Engn Sci, Coll Engn, BIC ESAT, Beijing 100871, Peoples R China; 5.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Wu XL,Yang MX,Li, Runguang,et al. Plastic accommodation during tensile deformation of gradient structure[J]. SCIENCE CHINA-MATERIALS,2021:11.
APA	武晓雷.,杨沐鑫.,Li, Runguang.,姜萍.,袁福平.,...&Wei, Yueguang.(2021).Plastic accommodation during tensile deformation of gradient structure.SCIENCE CHINA-MATERIALS,11.
MLA	武晓雷,et al."Plastic accommodation during tensile deformation of gradient structure".SCIENCE CHINA-MATERIALS (2021):11.

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