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Interaction between a screw dislocation and stacking faults in FCC metals
Wei HJ(魏豪杰); Wei YG(魏悦广); Wei, HJ
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
2012-03-31
Volume541Issue:4Pages:38-44
ISSN0921-5093
AbstractThe 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.
KeywordMolecular 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
Subject Area固体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000303178800007
Funding OrganizationAll 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.
DepartmentLNM新型材料及结构的多尺度力学
Classification一类
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Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46682
Collection非线性力学国家重点实验室
Corresponding AuthorWei, HJ
Recommended Citation
GB/T 7714
Wei HJ,Wei YG,Wei, HJ. 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.(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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