Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30125
Title: Interaction of a transonic dislocation with subsonic dislocation and point defect clusters
Authors: Shi, SQ 
Huang, H
Woo, CH 
Keywords: Mechanics
Molecular dynamics
Simulation
Transonic dislocation
Issue Date: 2002
Publisher: Elsevier
Source: Computational materials science, 2002, v. 23, no. 1-4, p. 95-104 How to cite?
Journal: Computational materials science 
Abstract: The moving speeds of all observed dislocations in crystals are subsonic. There has been a view in the literature that the speed of subsonic dislocations can not be accelerated above the speed of sound because the energy required would be infinitely large. Recent molecular dynamics (MD) simulation had shown that it is possible to generate dislocations with an initial moving speed higher than the velocity of sound in solids. This raises a question: what will happen when a supersonic dislocation meets other defects along its moving path? This work reports the results of MD simulation on the interaction of a transonic dislocation with other subsonic dislocations as well as with point defect clusters. The results show that a vacancy cluster such as a void has an insignificant slow-down effect on the transonic dislocation, while a subsonic dislocation slows down the transonic dislocation to subsonic one. In some cases, the subsonic dislocation (or a subsonic part of a transonic dislocation) can overcome the traditional sound barrier.
URI: http://hdl.handle.net/10397/30125
ISSN: 0927-0256
DOI: 10.1016/S0927-0256(01)00227-0
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