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)
刊名	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2012-06-01
通讯作者邮箱	xiaomingliu@lnm.imech.ac.cn
卷号	55 期号:6 页码:1010-1017
关键词	nanowire yield strength vacancies size effect Molecular-Dynamics Mechanical-Properties Strain Gradients Metal Nanowires Gold Nanowires Strength Deformation Size Cu Crystals
ISSN号	1674-7348
通讯作者	Liu, XM (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
产权排序	[Liu XiaoMing;Wei YueGuang] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; [Yang XiaoBin] China Univ Min & Technol, Sch Resources & Safety Engn, Beijing 100083, Peoples R China
合作状况	国内
中文摘要	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.
学科主题	新型材料的力学问题
分类号	二类/Q3
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1007/s11433-012-4742-5
语种	英语
WOS记录号	WOS:000304351900013
公开日期	2013-01-18
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/46730]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Liu XM,Yang XB,Wei YG. 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.(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.