Grain boundary-mediated plasticity accommodating the cracking process in nanograined gold: In situ observations and simulations

doi:10.1016/j.scriptamat.2020.113693

IMECH-IR > 非线性力学国家重点实验室

	Grain boundary-mediated plasticity accommodating the cracking process in nanograined gold: In situ observations and simulations
	Yang Xu-Sheng 1,2; Yuan Shuqing 1; Fu Hui 1; Wang YJ(王云江)3
通讯作者	Yang, Xu-Sheng(xsyang@polyu.edu.hk) ; Wang, Yun-Jiang(yjwang@imech.ac.cn)
发表期刊	SCRIPTA MATERIALIA
	2021-03-15
卷号	194 页码:6
ISSN	1359-6462
摘要	In this study, the underlying atomic-scale plastic deformation mechanisms responsible for the crack propagation process in nanograined gold thin film with an average grain size of similar to 10 nm (ranging from similar to 2 nm to similar to 22 nm) is investigated by the in situ high-resolution transmission electron microscope observations (i.e., a homemade device with atomic force microscope inside transmission electron microscope) and atomistic molecular dynamic simulations. The real-time results based on the experimental observations and simulations uncover consistently that the crack propagation in nanograined gold thin film is accommodated by the grain boundary-mediated plasticity, which may result in the grain coalescence between neighboring nanograins. Furthermore, we find that the grain boundary-mediated plasticity is grain size-dependent, i.e., GB dislocation activities-induced grain rotation in relative larger grains and GB migration in relative smaller grains in comparison with a critical grain size of similar to 10 nm. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Nanocrystalline metal Crack propagation Plastic deformation, In situ transmission electron microscope Molecular dynamic simulations
DOI	10.1016/j.scriptamat.2020.113693
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000632783300082
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助项目	National Natural Science Foundation of China Projects[51701171] ; National Natural Science Foundation of China Projects[51971187] ; PolyU project[G-YBZ3] ; PolyU project[4-BCER] ; NSCF[11672299] ; NSCF[12072344] ; National Key Research and Development Program of China[2017YFB0701502] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2017025]
项目资助者	National Natural Science Foundation of China Projects ; PolyU project ; NSCF ; National Key Research and Development Program of China ; Youth Innovation Promotion Association of Chinese Academy of Sciences
论文分区	一类
力学所作者排名	1
引用统计	被引频次：6[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/311007/86348
专题	非线性力学国家重点实验室
作者单位	1.Hong Kong Polytech Univ, Dept Ind & Syst Engn, State Key Lab Ultraprecis Machining Technol, Hung Hom,Kowloon, Hong Kong, Peoples R China; 2.Hong Kong Polytech Univ, Shenzhen Res Inst, Shenzhen, Peoples R China; 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Yang Xu-Sheng,Yuan Shuqing,Fu Hui,et al. Grain boundary-mediated plasticity accommodating the cracking process in nanograined gold: In situ observations and simulations[J]. SCRIPTA MATERIALIA,2021,194:6.
APA	Yang Xu-Sheng,Yuan Shuqing,Fu Hui,&王云江.(2021).Grain boundary-mediated plasticity accommodating the cracking process in nanograined gold: In situ observations and simulations.SCRIPTA MATERIALIA,194,6.
MLA	Yang Xu-Sheng,et al."Grain boundary-mediated plasticity accommodating the cracking process in nanograined gold: In situ observations and simulations".SCRIPTA MATERIALIA 194(2021):6.

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