Yielding behavior of copper nanowire in the presence of vacancies

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	Yielding behavior of copper nanowire in the presence of vacancies
	Liu XM(刘小明); Yang XB; Wei YG(魏悦广); Liu, XM (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
发表期刊	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2012-06-01
卷号	55 期号:6 页码:1010-1017
ISSN	1674-7348
摘要	In the present research, the measurement fluctuations of mechanical properties in nanowires (NWs) are investigated by using the molecular dynamics simulation. The large numbers of simulations are performed to study the yield behaviors of the NWs. The results have shown that the yield behavior of the smaller diameter NW is more sensitive to the presence of vacancies, and the dispersion of the measured mechanical properties for the small scale NW is larger than that for the large scale NW. Present results have also shown that vacancies escape from the bulk to the free surfaces as a result of high stress applied at the small scale systems similar to the dislocation starvation phenomenon observed in the compression test of nano-pillars, and dislocation nucleation induced by surface defect occurs after the vacancy reaches free surface leading to lower yield strength. Moreover, the strong surface vacancy interactions at the nanoscale level are also investigated.
关键词	Nanowire Yield Strength Vacancies Size Effect Molecular-dynamics Mechanical-properties Strain Gradients Metal Nanowires Gold Nanowires Strength Deformation Size Cu Crystals
学科领域	新型材料的力学问题
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000304351900013
课题组名称	LNM新型材料及结构的多尺度力学
论文分区	二类/Q3
引用统计	被引频次：12[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/311007/46730
专题	非线性力学国家重点实验室
通讯作者	Liu, XM (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Liu XM,Yang XB,Wei YG,et al. Yielding behavior of copper nanowire in the presence of vacancies[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2012,55,6,:1010-1017.
APA	刘小明,Yang XB,Wei YG,&Liu, XM .(2012).Yielding behavior of copper nanowire in the presence of vacancies.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,55(6),1010-1017.
MLA	刘小明,et al."Yielding behavior of copper nanowire in the presence of vacancies".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 55.6(2012):1010-1017.

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