Dislocation formation and twinning from the crack tip in Ni3Al: molecular dynamics simulations
文献类型：期刊论文
| 作者 | Xie Hong-Xian2; Wang Chong-Yu1,2,3; Yu Tao2; Du Jun-Ping2 |
| 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 |
| ISSN号 | 1674-1056 |
| 通讯作者 | Xie Hong-Xian(hongxianxie@163.com) |
| 英文摘要 | 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. |
| 资助项目 | National Basic Research Program of China[2006CB605102] ; National Natural Science Foundation of China[90306016] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000262494700041 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Basic Research Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/96299]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Xie Hong-Xian |
| 作者单位 | 1.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China 2.Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China 3.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, 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. |
入库方式： OAI收割
来源：金属研究所
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