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 | |
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 | |
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. |
条目包含的文件 | 下载所有文件 | |||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Jp2021145.pdf(4682KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论