Molecular dynamics study of the interaction between nanoscale interstitial dislocation loops and grain boundaries in BCC iron
文献类型：期刊论文
| 作者 | Gao, N.1; Perez, D.2; Lu, G. H.3; Wang, Z. G.1 |
| 刊名 | JOURNAL OF NUCLEAR MATERIALS
 |
| 出版日期 | 2018 |
| 卷号 | 498页码:378-386 |
| 关键词 | Absorption Symmetrical grain boundary Asymmetrical grain boundary Nano grain boundary Dislocation loop |
| ISSN号 | 0022-3115 |
| DOI | 10.1016/j.jnucmat.2017.10.069 |
| 英文摘要 | Atomic simulations are used to investigate the interaction between nanoscale interstitial dislocation loops and grain boundaries (GBs), the subsequent evolution of the GBs' structures, and the resulting impact on mechanical properties, in BCC iron. The interaction between loops and GBs - Sigma 3{111} and Sigma 3{112} - is affected by the angle (theta) between the Burgers vector and the normal to the GB plane, as well as by the distribution of free volume (FV) and stress. Loops can be totally absorbed by Sigma 3{111} boundaries, while the interaction with Sigma 3{112} boundaries is found to change the Burgers vector and habit plane after absorption, but to otherwise leave the loop intact, resulting in selective absorption. When theta = 90 degrees, no absorption occurs in Sigma 3{112}. The stress accumulation induced by the absorption affects the local mechanical properties of GBs. In nanocrystalline iron sample, a similar phenomenon is also observed, resulting in rearrangement of GBs and grain growth. (C) 2017 Elsevier B.V. All rights reserved. |
| WOS关键词 | CENTERED-CUBIC METALS ; TWIN BOUNDARIES ; IN-SITU ; LATTICE DISLOCATIONS ; IRRADIATED IRON ; NANOINDENTATION ; MICROSTRUCTURE ; DEFORMATION ; SIMULATIONS ; ENERGIES |
| 资助项目 | National Natural Science Foundation of China[11375242] ; National Natural Science Foundation of China[11675230] ; National Natural Science Foundation of China[91426301] ; United States Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division ; U.S. DOE[DE-AC52-06NA25396] |
| WOS研究方向 | Materials Science ; Nuclear Science & Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000418472300043 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Natural Science Foundation of China ; United States Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division ; U.S. DOE |
| 源URL | [http://119.78.100.186/handle/113462/46171]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Gao, N. |
| 作者单位 | 1.Inst Modern Phys, Lab Adv Nucl Mat, Lanzhou 730000, Gansu, Peoples R China 2.Los Alamos Natl Lab, Theoret Div T 1, POB 1663, Los Alamos, NM 87545 USA 3.Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, N.,Perez, D.,Lu, G. H.,et al. Molecular dynamics study of the interaction between nanoscale interstitial dislocation loops and grain boundaries in BCC iron[J]. JOURNAL OF NUCLEAR MATERIALS,2018,498:378-386. |
| APA | Gao, N.,Perez, D.,Lu, G. H.,&Wang, Z. G..(2018).Molecular dynamics study of the interaction between nanoscale interstitial dislocation loops and grain boundaries in BCC iron.JOURNAL OF NUCLEAR MATERIALS,498,378-386. |
| MLA | Gao, N.,et al."Molecular dynamics study of the interaction between nanoscale interstitial dislocation loops and grain boundaries in BCC iron".JOURNAL OF NUCLEAR MATERIALS 498(2018):378-386. |
入库方式： OAI收割
来源：近代物理研究所
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