Atomistic simulation for configuration evolution and energetic calculation of crack in body-centered-cubic iron
文献类型：期刊论文
| 作者 | L. X. Cao ; C. Y. Wang |
| 刊名 | Journal of Materials Research
 |
| 出版日期 | 2006 |
| 卷号 | 21期号:10页码:2542-2549 |
| 关键词 | molecular-dynamics simulation to-ductile transition dislocation emission alpha-iron activation-energy single-crystals fracture tip deformation cleavage |
| ISSN号 | 0884-2914 |
| 中文摘要 | The molecular dynamics method has been used to simulate mode I cracking in body-centered-cubic iron. Close attention has been paid to the process of the atomic configuration evolution of the cracks. The simulation shows that at low temperatures, partial dislocations are emitted before the initiation of crack propagation, subsequently forming the stacking faults or multilayer twins on {112} planes, and then brittle cleavage and extended dislocation nucleation are observed at the crack tip accompanied by twin extension. These results are in agreement with the experimental observation that twinning and fracture processes cooperate at low temperatures. Furthermore, an energetics analysis has been made on the deformation behavior observed at the crack tip. The effect of temperature on the fracture process is discussed. At the higher temperature, plastic deformation becomes easier, and crack blunting occurs. With increasing temperature, the fracture resistance increases, and the effect of the lattice trapping can be weakened by thermal activation. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/34135]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | L. X. Cao,C. Y. Wang. Atomistic simulation for configuration evolution and energetic calculation of crack in body-centered-cubic iron[J]. Journal of Materials Research,2006,21(10):2542-2549. |
| APA | L. X. Cao,&C. Y. Wang.(2006).Atomistic simulation for configuration evolution and energetic calculation of crack in body-centered-cubic iron.Journal of Materials Research,21(10),2542-2549. |
| MLA | L. X. Cao,et al."Atomistic simulation for configuration evolution and energetic calculation of crack in body-centered-cubic iron".Journal of Materials Research 21.10(2006):2542-2549. |
入库方式： OAI收割
来源：金属研究所
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