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-Sheng1,2; Yuan Shuqing1; Fu Hui1; Wang YJ(王云江)3
Corresponding AuthorYang, Xu-Sheng(xsyang@polyu.edu.hk) ; Wang, Yun-Jiang(yjwang@imech.ac.cn)
Source PublicationSCRIPTA MATERIALIA
2021-03-15
Volume194Pages:6
ISSN1359-6462
AbstractIn 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.
KeywordNanocrystalline metal Crack propagation Plastic deformation, In situ transmission electron microscope Molecular dynamic simulations
DOI10.1016/j.scriptamat.2020.113693
Indexed BySCI ; EI
Language英语
WOS IDWOS:000632783300082
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding ProjectNational 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]
Funding OrganizationNational 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
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/86348
Collection非线性力学国家重点实验室
Affiliation1.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
Recommended Citation
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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