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Computer Simulation of Plastic Deformation in GrainBoundary Region under High Rate Loading
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作者 K.P.Zolnikov S.G.Psakhie S-I.Negrskul and S. Yu.Korostelev (Institute of Strength Physics and Materials Science, Russian Academy of Sicences, Siberian Branch,Akademicheskii pr.2/1, 634048 Tomsk, Russia)(To whom correspondence should be addressed) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1996年第3期235-237,共3页
The computer simulation of Al three-dimensional crystallite containing grain boundary of special type was carried out and its behaviour under high rate loading was investigated. The molecular dynamics method was used ... The computer simulation of Al three-dimensional crystallite containing grain boundary of special type was carried out and its behaviour under high rate loading was investigated. The molecular dynamics method was used and interaction betwen atoms was described based on pseudopotential method. Vortical character of the atom movements in the grain boundary region is realized under shear loading in certain directions. Back and forth movements of atoms in the direction which is perpendicular to the shear also arise. Amplitude of such movements is approximately equal to an interplanar distance in this direction. 展开更多
关键词 SIMULATION Computer Simulation of Plastic Deformation in grainboundary Region under High Rate Loading
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THERMAL STRUCTURAL DISORDER AND MELTING TRANSITION IN HIGH-ANGLE GRAIN-BOUNDARY: A MOLECULAR-DYNAMICS STUDY
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作者 S.J.Zhao Y.C.Wang +3 位作者 J.Q.You Q.B.Yang L.G.Zhou H.Q.Ye 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1998年第5期365-375,共11页
A structural transition in the fcc ∑=5 (120)/[001] high-angle tilt grain-boundary(GB)is investigated by molecular-dynamics simulation. The calculations have been performed at various temperutures and the thermodynami... A structural transition in the fcc ∑=5 (120)/[001] high-angle tilt grain-boundary(GB)is investigated by molecular-dynamics simulation. The calculations have been performed at various temperutures and the thermodynamic melting point Tm of the model system is determined by using a many-body potential fitted to copper. A thermal disorder transition in the GB region occurs well below the melting point. Our results indicate that such a transition is a continuous process and there is no evidence of premelting, which is entirely in accord with experiment results and theoretical prediction.Moreover we also observed that melting initiated at the interface and then propagated into the bulk quickly at or above Tm. 展开更多
关键词 moleculandynamics grainboundary structural transition
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Limited Effect of Twin Boundaries on Radiation Damage 被引量:2
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作者 Jin Gao Zhi-Jun Liu Fa-Rong Wan 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2016年第1期72-78,共7页
The different influences of the general grain boundary and the twin boundary on the cavity formation were investigated in copper irradiated by helium at room temperature. Large number of the cavities with sizes smalle... The different influences of the general grain boundary and the twin boundary on the cavity formation were investigated in copper irradiated by helium at room temperature. Large number of the cavities with sizes smaller than 5 nm formed after irradiation, which were almost homogenously distributed inside the grains. However, the distribution of the cavities varied near the general grain boundary and the twin boundary. Cavities-depleted zone was readily observed near the general grain boundaries, which was rarely observed near the twin boundaries. Meanwhile, decoration of dense cavities within the grain boundary plane was observed. The results suggested the limited influence of the twin boundaries as the point defect sinks compared with the general grain boundaries. 展开更多
关键词 Transmission electron microscopy CAVITIES Cavities-depleted zone General grainboundary Twin boundary
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