Molecular Dynamics Study Of The Mechanical Behavior Of Nickel Nanowire: Strain Rate Effects

doi:10.1016/j.commatsci.2007.05.012

IMECH-IR > 力学所知识产出(1956-2008)

	Molecular Dynamics Study Of The Mechanical Behavior Of Nickel Nanowire: Strain Rate Effects
	Wen YH(文玉华); Zhu ZZ; Zhu RC(朱如曾); Zhu, ZZ (reprint author), Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China.
发表期刊	Computational Materials Science
	2008
页码	553-560
ISSN	0927-0256
摘要	We present the analysis of uniaxial deformation of nickel nanowires using molecular dynamics simulations, and address the strain rate effects on mechanical responses and deformation behavior. The applied strain rate is ranging from 1 x 10(8) s(-1) to 1.4 x 10(11) s(-1). The results show that two critical strain rates, i.e., 5 x 10(9) s(-1) and 8 x 10(10) s(-1), are observed to play a pivotal role in switching between plastic deformation modes. At strain rate below 5 x 10(9) s(-1), Ni nanowire maintains its crystalline structure with neck occurring at the end of loading, and the plastic deformation is characterized by {111} slippages associated with Shockley partial dislocations and rearrangements of atoms close to necking region. At strain rate above 8x10(10) s(-1), Ni nanowire transforms from a fcc crystal into a completely amorphous state once beyond the yield point, and hereafter it deforms uniformly without obvious necking until the end of simulation. For strain rate between 5 x 10(9) s(-1) and 8 x 10(10) s(-1), only part of the nanowire exhibits amorphous state after yielding while the other part remains crystalline state. Both the {111} slippages in ordered region and homogenous deformation in amorphous region contribute to the plastic deformation. (C) 2007 Published by Elsevier B.V.
关键词	Nanowire Mechanical Properties Strain Rate Molecular Dynamics Tensile Deformation Metallic Nanowires Amorphization Simulation Copper Size
DOI	10.1016/j.commatsci.2007.05.012
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000254338800017
关键词[WOS]	TENSILE DEFORMATION ; METALLIC NANOWIRES ; AMORPHIZATION ; SIMULATION ; COPPER ; SIZE
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
引用统计	被引频次：132[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/26096
专题	力学所知识产出(1956-2008)
通讯作者	Zhu, ZZ (reprint author), Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China.
推荐引用方式 GB/T 7714	Wen YH,Zhu ZZ,Zhu RC,et al. Molecular Dynamics Study Of The Mechanical Behavior Of Nickel Nanowire: Strain Rate Effects[J]. Computational Materials Science,2008:553-560.
APA	文玉华,Zhu ZZ,朱如曾,&Zhu, ZZ .(2008).Molecular Dynamics Study Of The Mechanical Behavior Of Nickel Nanowire: Strain Rate Effects.Computational Materials Science,553-560.
MLA	文玉华,et al."Molecular Dynamics Study Of The Mechanical Behavior Of Nickel Nanowire: Strain Rate Effects".Computational Materials Science (2008):553-560.

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