The uniaxial tensile deformation of Ni nanowire: atomic-scale computer simulations

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	The uniaxial tensile deformation of Ni nanowire: atomic-scale computer simulations
	Wen, Y. H. ; Zhu, Z. Z. ; Shao, G. F. ; Zhu, R. Z. ; Wen YH(文玉华)
刊名	http://dx.doi.org/10.1016/j.physe.2004.10.009
	2005-03
关键词	MOLECULAR-DYNAMICS NANOCRYSTALLINE MATERIALS NANOSTRUCTURED MATERIALS AMORPHIZATION TEMPERATURE CRYSTALLIZATION METALS STRAIN
英文摘要	The mechanical deformations of nickel nanowire subjected to uniaxial tensile strain at 300 K are simulated by using molecular dynamics with the quantum corrected Sutten-Chen many-body force field. We have used common neighbor analysis method to investigate the structural evolution of Ni nanowire during the elongation process. For the strain rate of 0.1%/ps, the elastic limit is up to about 11% strain with the yield stress of 8.6 GPa. At the elastic stage, the deformation is carried mainly through the uniform elongation of the distances between the layers (perpendicular to the Z-axis) while the atomic structure remains basically unchanged. With further strain, the slips in the {111} planes start to take place in order to accommodate the applied strain to carry the deformation partially, and subsequently the neck forms. The atomic rearrangements in the neck region result in a zigzag change in the stress-strain curve; the atomic structures beyond the region, however, have no significant changes. With the strain close to the point of the breaking, we observe the formation of a one-atom thick necklace in Ni nanowire. The strain rates have no significant effect on the deformation mechanism, but have some influence on the yield stress, the elastic limit, and the fracture strain of the nanowire. (c) 2004 Elsevier B.V. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/69231]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Wen, Y. H.,Zhu, Z. Z.,Shao, G. F.,et al. The uniaxial tensile deformation of Ni nanowire: atomic-scale computer simulations[J]. http://dx.doi.org/10.1016/j.physe.2004.10.009,2005.
APA	Wen, Y. H.,Zhu, Z. Z.,Shao, G. F.,Zhu, R. Z.,&文玉华.(2005).The uniaxial tensile deformation of Ni nanowire: atomic-scale computer simulations.http://dx.doi.org/10.1016/j.physe.2004.10.009.
MLA	Wen, Y. H.,et al."The uniaxial tensile deformation of Ni nanowire: atomic-scale computer simulations".http://dx.doi.org/10.1016/j.physe.2004.10.009 (2005).