Interaction between a screw dislocation and stacking faults in FCC metals

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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
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2012-03-31
卷号	541 期号:4 页码:38-44
ISSN	0921-5093
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.
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
学科领域	固体力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000303178800007
项目资助者	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.
课题组名称	LNM新型材料及结构的多尺度力学
论文分区	一类
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/46682
专题	非线性力学国家重点实验室
通讯作者	Wei, HJ
推荐引用方式 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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