TITLE

Destabilization of dislocation dipole at high velocity

AUTHOR(S)
Wang, Jian; Woo, C. H.; Huang, Hanchen
PUB. DATE
November 2001
SOURCE
Applied Physics Letters;11/26/2001, Vol. 79 Issue 22, p3621
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Under mechanical deformation of very high strain rates, it is expected that dislocations may move very fast (being subsonic, transonic, or even supersonic). As a result, two dislocations may approach each other at high velocities. Our earlier analyses of linear elasticity indicate that a dipole is destabilized when the approaching velocity is high enough—even below the speed of sound. In this letter, using the molecular dynamics method, we demonstrate that a dipole indeed can be destabilized above a critical velocity, and stable below that. © 2001 American Institute of Physics.
ACCESSION #
5559045

 

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