Molecular dynamics simulation of nanomachining process and mechanical properties of nanostructure

IMR OpenIR

	Molecular dynamics simulation of nanomachining process and mechanical properties of nanostructure
其他题名	MOLECULAR DYNAMICS SIMULATION OF NANOMACHINING PROCESS AND MECHANICAL PROPERTIES OF NANOSTRUCTURE
	Liang Yingchen 1; Chen Jiaxuan 1; Bai Qingshun 1; Tang Yulan 2; Chen Mingjun 1
	2008
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	44 期号:8 页码:937-942
摘要	Nanomachining and tensile process of Cu (111) plane nanostructures were simulated by molecular dynamics, and the defect behavior during nanomachining process and its effect on mechanical properties of nanostructure were analyzed at atomic scale. The results show that the atoms at the frontage or back of the AFM tip deviated from their initial positions and formed a deformation zone in nanostructure. Dislocations only propagate in surface and subsurface when scratching depth is shallow, and some dislocations formed dislocation loops as there existed stress gradient near tip. The number of residual defects increases and ordering degree of crystal structures decreases with scratching depth increasing. There existed high residual stress in subsurface, expecially near the position where tool withdraw nanostructure. The rensile curves of the scratched nanostructure are not smooth, which is related to residual stress and defect at the elastic stage, and to dislocation multiplication and pile up at the plastic stage. Ordering degree of nanostructure decreases with seratching depth increasing, while ordering degree for small scratching depth at the strain of 0.8 is better than that at the first yielding of strain 0.045.
关键词	COPPER CRYSTAL INDENTATION BEHAVIOR molecular dynamics nanomachining tension dislocation residual stress nanostructure
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:3339357
引用统计	被引频次：4[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/148064
专题	中国科学院金属研究所
作者单位	1.Harbin Institute Technol, Ctr Precis Engn, Harbin 150001, Peoples R China 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Liang Yingchen,Chen Jiaxuan,Bai Qingshun,et al. Molecular dynamics simulation of nanomachining process and mechanical properties of nanostructure[J]. ACTA METALLURGICA SINICA,2008,44(8):937-942.
APA	Liang Yingchen,Chen Jiaxuan,Bai Qingshun,Tang Yulan,&Chen Mingjun.(2008).Molecular dynamics simulation of nanomachining process and mechanical properties of nanostructure.ACTA METALLURGICA SINICA,44(8),937-942.
MLA	Liang Yingchen,et al."Molecular dynamics simulation of nanomachining process and mechanical properties of nanostructure".ACTA METALLURGICA SINICA 44.8(2008):937-942.