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 YH(文玉华); Zhu ZZ; Shao GF; Zhu RC(朱如曾)
刊名	Physica E-Low-Dimensional Systems & Nanostructures
	2005
通讯作者邮箱	zzhu@xmu.edu.cn
卷号	27 期号:1 页码:113-120
ISSN号	1386-9477
通讯作者	Zhu, ZZ (reprint author), Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China.
中文摘要	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.
学科主题	力学
类目[WOS]	Nanoscience & Nanotechnology ; Physics, Condensed Matter
研究领域[WOS]	Science & Technology - Other Topics ; Physics
关键词[WOS]	MOLECULAR-DYNAMICS ; NANOCRYSTALLINE MATERIALS ; NANOSTRUCTURED MATERIALS ; AMORPHIZATION ; TEMPERATURE ; CRYSTALLIZATION ; METALS ; STRAIN
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000227813200016
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16274]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Wen YH,Zhu ZZ,Shao GF,et al. The Uniaxial Tensile Deformation of Ni Nanowire: Atomic-Scale Computer Simulations[J]. Physica E-Low-Dimensional Systems & Nanostructures,2005,27(1):113-120.
APA	文玉华,Zhu ZZ,Shao GF,&朱如曾.(2005).The Uniaxial Tensile Deformation of Ni Nanowire: Atomic-Scale Computer Simulations.Physica E-Low-Dimensional Systems & Nanostructures,27(1),113-120.
MLA	文玉华,et al."The Uniaxial Tensile Deformation of Ni Nanowire: Atomic-Scale Computer Simulations".Physica E-Low-Dimensional Systems & Nanostructures 27.1(2005):113-120.