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Atomistic investigation of the annihilation of non-screw dislocation dipoles in Al, Cu, Ni and gamma-TiAl
H. Wang; D. S. Xu; D. Rodney; P. Veyssiere; R. Yang
2013
Source PublicationModelling and Simulation in Materials Science and Engineering
ISSN0965-0393
Volume21Issue:2
AbstractAnnihilation of vacancy-type non-screw dipolar dislocations is studied with molecular dynamics in fcc metals Al, Cu and Ni, and intermetallic gamma-TiAl. Contrary to common belief, dipoles do not simply disappear. Instead, they transform into a series of defects depending on their height, orientation and temperature. At low temperatures, hollow structures, reconstructed configurations and faulted dipoles are formed. At high temperatures, with the help of short-range diffusion, isolated or interconnected vacancy clusters and stacking-fault tetrahedra are formed within a simulation time of 1 ns. Employing saddle-point-search methods, the formation of the above by-products is explained by accelerated diffusion paths along the dipole cores.
description.department[wang, h. ; xu, d. s. ; yang, r.] chinese acad sci, inst met res, shenyang 110016, peoples r china. [wang, h. ; rodney, d.] cnrs ujf, inp grenoble, simap, f-38402 st martin dheres, france. [veyssiere, p.] cnrs onera, lem, f-92322 chatillon, france. ; wang, h (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china. ; haowang@imr.ac.cn
KeywordCopper Single-crystals Activation-relaxation Technique Interatomic Potentials Faulted Dipoles Fcc Metals Deformation Equilibrium Dynamics Clusters Heights
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71524
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
H. Wang,D. S. Xu,D. Rodney,et al. Atomistic investigation of the annihilation of non-screw dislocation dipoles in Al, Cu, Ni and gamma-TiAl[J]. Modelling and Simulation in Materials Science and Engineering,2013,21(2).
APA H. Wang,D. S. Xu,D. Rodney,P. Veyssiere,&R. Yang.(2013).Atomistic investigation of the annihilation of non-screw dislocation dipoles in Al, Cu, Ni and gamma-TiAl.Modelling and Simulation in Materials Science and Engineering,21(2).
MLA H. Wang,et al."Atomistic investigation of the annihilation of non-screw dislocation dipoles in Al, Cu, Ni and gamma-TiAl".Modelling and Simulation in Materials Science and Engineering 21.2(2013).
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