| Molecular dynamics simulation of nanomachining process and mechanical properties of nanostructure | |
| Alternative Title | MOLECULAR DYNAMICS SIMULATION OF NANOMACHINING PROCESS AND MECHANICAL PROPERTIES OF NANOSTRUCTURE |
| Liang Yingchen1; Chen Jiaxuan1; Bai Qingshun1; Tang Yulan2; Chen Mingjun1 | |
| 2008 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 44Issue:8Pages:937-942 |
| Abstract | 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. |
| Keyword | COPPER CRYSTAL INDENTATION BEHAVIOR molecular dynamics nanomachining tension dislocation residual stress nanostructure |
| Indexed By | CSCD |
| Language | 英语 |
| CSCD ID | CSCD:3339357 |
| Citation statistics |
Cited Times:4[CSCD]
[CSCD Record]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/148064 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.Harbin Institute Technol, Ctr Precis Engn, Harbin 150001, Peoples R China 2.中国科学院金属研究所 |
| Recommended Citation 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. |
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