Dislocation formation and twinning from the crack tip in Ni(3)Al: molecular dynamics simulations
文献类型：期刊论文
| 作者 | H. X. Xie ; C. Y. Wang ; T. Yu ; J. P. Du |
| 刊名 | Chinese Physics B
 |
| 出版日期 | 2009 |
| 卷号 | 18期号:1页码:251-258 |
| 关键词 | molecular dynamic crack Shockley partial dislocation stacking fault single-crystal superalloy 110 screw dislocations li-2 ordered alloys atomistic simulations computer-simulation fault energies core structure gamma'-phase creep behavior |
| ISSN号 | 1674-1056 |
| 中文摘要 | The mechanism of low-temperature deformation in a fracture process of L1(2) Ni(3)Al is studied by molecular dynamic simulations. Owing to the unstable stacking energy, the [0 (1) over bar1] superdislocation is dissociated into partial dislocations separated by a stacking fault. The simulation results show that when the crack speed is larger than a critical speed, the Shockley partial dislocations will break forth from both the crack tip and the vicinity of the crack tip; subsequently the super intrinsic stacking faults are formed in adjacent {111} planes, meanwhile the super extrinsic stacking faults and twinning also occur. Our simulation results suggest that at low temperatures the ductile fracture in L1(2) Ni(3)Al is accompanied by twinning, which is produced by super-intrinsic stacking faults formed in adjacent {111} planes. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32449]  |
| 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 | H. X. Xie,C. Y. Wang,T. Yu,et al. Dislocation formation and twinning from the crack tip in Ni(3)Al: molecular dynamics simulations[J]. Chinese Physics B,2009,18(1):251-258. |
| APA | H. X. Xie,C. Y. Wang,T. Yu,&J. P. Du.(2009).Dislocation formation and twinning from the crack tip in Ni(3)Al: molecular dynamics simulations.Chinese Physics B,18(1),251-258. |
| MLA | H. X. Xie,et al."Dislocation formation and twinning from the crack tip in Ni(3)Al: molecular dynamics simulations".Chinese Physics B 18.1(2009):251-258. |
入库方式： OAI收割
来源：金属研究所
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