| Dislocation formation and twinning from the crack tip in Ni3Al: molecular dynamics simulations | |
| Xie Hong-Xian1; Wang Chong-Yu1,2,3; Yu Tao1; Du Jun-Ping1 | |
| 通讯作者 | Xie Hong-Xian(hongxianxie@163.com) |
| 2009 | |
| 发表期刊 | CHINESE PHYSICS B
 |
| ISSN | 1674-1056 |
| 卷号 | 18期号:1页码:251-258 |
| 摘要 | The mechanism of low-temperature deformation in a fracture process of L1(2) Ni3Al 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) Ni3Al is accompanied by twinning, which is produced by super-intrinsic stacking faults formed in adjacent {111} planes. |
| 关键词 | molecular dynamic crack Shockley partial dislocation stacking fault |
| 资助者 | National Basic Research Program of China ; National Natural Science Foundation of China |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Basic Research Program of China[2006CB605102] ; National Natural Science Foundation of China[90306016] |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| WOS记录号 | WOS:000262494700041 |
| 出版者 | IOP PUBLISHING LTD |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/96300 |
| 专题 | 中国科学院金属研究所 |
| 通讯作者 | Xie Hong-Xian |
| 作者单位 | 1.Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China 3.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xie Hong-Xian,Wang Chong-Yu,Yu Tao,et al. Dislocation formation and twinning from the crack tip in Ni3Al: molecular dynamics simulations[J]. CHINESE PHYSICS B,2009,18(1):251-258. |
| APA | Xie Hong-Xian,Wang Chong-Yu,Yu Tao,&Du Jun-Ping.(2009).Dislocation formation and twinning from the crack tip in Ni3Al: molecular dynamics simulations.CHINESE PHYSICS B,18(1),251-258. |
| MLA | Xie Hong-Xian,et al."Dislocation formation and twinning from the crack tip in Ni3Al: molecular dynamics simulations".CHINESE PHYSICS B 18.1(2009):251-258. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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