Molecular dynamics simulation of nanomachining process and mechanical properties of nanostructure
文献类型：期刊论文
| 作者 | Liang Yingchen1; Chen Jiaxuan1; Bai Qingshun1; Tang Yulan2; Chen Mingjun1 |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2008 |
| 卷号 | 44期号:8页码:937-942 |
| 关键词 | COPPER CRYSTAL INDENTATION BEHAVIOR molecular dynamics nanomachining tension dislocation residual stress nanostructure |
| ISSN号 | 0412-1961 |
| 其他题名 | MOLECULAR DYNAMICS SIMULATION OF NANOMACHINING PROCESS AND MECHANICAL PROPERTIES OF NANOSTRUCTURE |
| 英文摘要 | 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. |
| 语种 | 英语 |
| CSCD记录号 | CSCD:3339357 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/148063]  |
| 专题 | 金属研究所_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. |
入库方式： OAI收割
来源：金属研究所
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