Strengthening effects of various grain boundaries with nano-spacing as barriers of dislocation motion from molecular dynamics simulations
文献类型：期刊论文
| 作者 | Yuan FP(袁福平); Yuan FP(袁福平) ; Yuan FP(袁福平); Yuan FP(袁福平)
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| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
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| 出版日期 | 2017-03-01 |
| 卷号 | 60期号:3 |
| ISSN号 | 1674-7348 |
| 关键词 | molecular dynamics grain boundary strengthening dislocations nanoindentation metals |
| 中文摘要 | Strengthening in metals is traditionally achieved through the controlled creation of various grain boundaries (GBs) such as low-angle GBs high-angle GBs and twin boundaries (TBs). In the present study a series of large-scale molecular dynamics simulations with spherical nanoindentation and carefully designed model were conducted to investigate and compare the strengthening effects of various GBs with nano-spacing as barriers of dislocation motion. Simulation results showed that high-angle twist GBs and TBs are similar barriers and low-angle twist GBs are less effective in obstructing dislocation motion. Corresponding atomistic mechanisms were also given. At a certain indentation depth dislocation transmission and dislocation nucleation from the other side of boundaries were observed for low-angle twist GBs whereas dislocations were completely blocked by high-angle twist GBs and TBs at the same indentation depth. The current findings should provide insights for comprehensive understanding of the strengthening effects of various GBs at nanoscale. |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | NANOCRYSTALLINE MATERIALS ; ATOMISTIC SIMULATIONS ; LATTICE DISLOCATIONS ; TENSILE DEFORMATION ; PLASTIC-DEFORMATION ; MECHANICAL-BEHAVIOR ; MAXIMUM STRENGTH ; METALS ; COPPER ; ALUMINUM |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000394526400005 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/60571]  |
| 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 | Yuan FP,Yuan FP,Yuan FP,et al. Strengthening effects of various grain boundaries with nano-spacing as barriers of dislocation motion from molecular dynamics simulations[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2017,60(3). |
| APA | Yuan FP,袁福平,袁福平,&袁福平.(2017).Strengthening effects of various grain boundaries with nano-spacing as barriers of dislocation motion from molecular dynamics simulations.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,60(3). |
| MLA | Yuan FP,et al."Strengthening effects of various grain boundaries with nano-spacing as barriers of dislocation motion from molecular dynamics simulations".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 60.3(2017). |
入库方式： OAI收割
来源：力学研究所
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