Interaction between a screw dislocation and stacking faults in FCC metals
文献类型：期刊论文
| 作者 | Wei HJ(魏豪杰); Wei YG(魏悦广) ; Wei, HJ; Wei, HJ
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| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2012-03-31 |
| 卷号 | 541期号:4页码:38-44 |
| 通讯作者邮箱 | weihaojiemail@gmail.com;ywei@LNM.imech.ac.cn |
| 关键词 | Molecular dynamics simulation Stacking fault Dislocation Planar fault energy Plastic deformation Coherent Twin Boundaries Molecular-Dynamics Simulation Centered-Cubic Metals Interaction Mechanisms Crack-Tip Tetrahedron Strength Copper Nanoscale Nanowires |
| ISSN号 | 0921-5093 |
| 产权排序 | [Wei, Haojie;Wei, Yueguang] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 通讯作者 | Wei, HJ |
| 中文摘要 | The mechanical properties of polycrystalline metals greatly depend on the interaction between lattice dislocation and planar defects, but some details about this interaction still need to be explored. In this paper, we investigated the impingement of a screw dislocation on intrinsic stacking fault (SF) and extrinsic stacking faults (ESF) in different FCC metals by using the molecular dynamics simulations. As a screw dislocation approaches a SF from one side, the response of SF will be one of the results: (1) annihilated;(2) transformed into ESF; (3) penetrated. Also, as a screw dislocation interacts with ESF, the response of ESF will be one of the results: (1) transformed into a three-layer thick twin; (2) into an SF; (3) penetrated. Dimensionless parameters relevant to the planar fault energies and their ratios are used to predict the propensity to different interaction modes. The results reveal the evolution law of internal defects clearly, which will be significant to further understand the details of plastic deformation and to seek the underlying techniques for strengthening metals. |
| 学科主题 | 固体力学 |
| 分类号 | 一类 |
| 收录类别 | SCI ; EI |
| 资助信息 | All of the simulations were performed using Lammps Molecular Dynamics Simulator [40] and visualized by Atomeye [41]. This work is supported by National Science Foundation of China through Grants Nos. 11021262, 10932011, 90816004 and 91116003;and by National Basic Research Program of China through 2012CB937500. |
| 原文出处 | http://dx.doi.org/10.1016/j.msea.2012.01.115 |
| 语种 | 英语 |
| WOS记录号 | WOS:000303178800007 |
| 公开日期 | 2013-01-18 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/46682]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Wei, HJ; Wei, HJ |
| 推荐引用方式 GB/T 7714 | Wei HJ,Wei YG,Wei, HJ,et al. Interaction between a screw dislocation and stacking faults in FCC metals[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2012,541(4):38-44. |
| APA | Wei HJ,Wei YG,Wei, HJ,&Wei, HJ.(2012).Interaction between a screw dislocation and stacking faults in FCC metals.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,541(4),38-44. |
| MLA | Wei HJ,et al."Interaction between a screw dislocation and stacking faults in FCC metals".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 541.4(2012):38-44. |
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来源：力学研究所
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