Effect of Grain Size and Twin Boundary Spacing on Plastic Deformation of Nano-polycrystalline Al Alloy by Molecular Dynamics Study

	Effect of Grain Size and Twin Boundary Spacing on Plastic Deformation of Nano-polycrystalline Al Alloy by Molecular Dynamics Study
	Ren, Junqiang1,4 ; Yang, Dan 1; Wang, Qi2 ; Lu, Xuefeng1 ; Zhang, Xudong 3; 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.