Lanzhou University of Technology Institutional Repository (LUT_IR)
Effect of Grain Size and Twin Boundary Spacing on Plastic Deformation of Nano-polycrystalline Al Alloy by Molecular Dynamics Study | |
Ren, Junqiang1,4; Yang, Dan1; Wang, Qi2; Lu, Xuefeng1; Zhang, Xudong3; Xue, Hongtao1; Tang, Fuling1; Ding, Yutian1 | |
2022-07-01 | |
发表期刊 | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
ISSN | 1002-185X |
卷号 | 51期号:7页码:2436-2445 |
摘要 | The molecular dynamics simulations were used to study the effect of grain size and twin density on the plastic deformation of nano-polycrystalline aluminum alloy. The results show that the dislocation density after relaxation is crucial to the microstructure evolution and the inverse Hall-Petch relation of the nano-polycrystalline Al. The staggered tetrahedrons and complex staggered structures are formed in the fine grains, which is attributed to the restriction of grain size. Thus, the auxiliary deformation of grain boundary is activated. The Shockley partial dislocations nucleate and multiply at the grain boundaries when the twin boundary spacing (TBS) is relatively large. However, with decreasing the TBS, the twin boundary becomes the source of the Shockley partial dislocations. A large number of partial dislocation nucleations at the twin boundary will cause the twin boundary to migrate or even disappear. The deformed nano-twins can also be observed during the plastic deformation process. This research provides theoretical basis for the development of advanced nano-polycrystalline Al alloy with adjustable mechanical properties. Copyright © 2022, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved. |
关键词 | Aluminum alloys Grain boundaries Grain size and shape Plastic deformation Polycrystalline materials Al-alloy Dislocation Grain-boundaries Grainsize Nano-polycrystalline aluminum Polycrystalline Polycrystalline aluminium Polycrystalline aluminum Twin Twin boundaries |
收录类别 | EI |
语种 | 英语 |
出版者 | Science Press |
EI入藏号 | 20223912806129 |
EI主题词 | Molecular dynamics |
EI分类号 | 541.2 Aluminum Alloys ; 801.4 Physical Chemistry ; 933.1 Crystalline Solids |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/160253 |
专题 | 省部共建有色金属先进加工与再利用国家重点实验室 材料科学与工程学院 电气工程与信息工程学院 |
作者单位 | 1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Energy Engineering, Huanghuai University, Zhumadian; 463000, China; 3.Network Information Center, Xi'an Jiaotong University, Xi'an; 710049, China; 4.State Key Laboratory for Mechanical Behavior of Materials, Xi 'an Jiaotong University, Xi'an; 710049, China |
第一作者单位 | 兰州理工大学 |
第一作者的第一单位 | 兰州理工大学 |
推荐引用方式 GB/T 7714 | Ren, Junqiang,Yang, Dan,Wang, Qi,et al. Effect of Grain Size and Twin Boundary Spacing on Plastic Deformation of Nano-polycrystalline Al Alloy by Molecular Dynamics Study[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2022,51(7):2436-2445. |
APA | Ren, Junqiang.,Yang, Dan.,Wang, Qi.,Lu, Xuefeng.,Zhang, Xudong.,...&Ding, Yutian.(2022).Effect of Grain Size and Twin Boundary Spacing on Plastic Deformation of Nano-polycrystalline Al Alloy by Molecular Dynamics Study.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,51(7),2436-2445. |
MLA | Ren, Junqiang,et al."Effect of Grain Size and Twin Boundary Spacing on Plastic Deformation of Nano-polycrystalline Al Alloy by Molecular Dynamics Study".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 51.7(2022):2436-2445. |
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