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Atomic-Scale Modeling of the Annihilation of Jogged Screw Dislocation Dipoles

Published online by Cambridge University Press:  15 February 2011

T. Vegge ,
O. B. Pedersen ,
T. Leffers  and
K. W. Jacobsen
T. Vegge
Affiliation:
Center for Atomic-scale Materials Physics and Department of Physics, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark Email: vegge@fysik.dtu.dk Materials Research Department, Risø National Laboratory, DK-4000 Roskilde, Denmark
O. B. Pedersen
Affiliation:
Materials Research Department, Risø National Laboratory, DK-4000 Roskilde, Denmark
T. Leffers
Affiliation:
Materials Research Department, Risø National Laboratory, DK-4000 Roskilde, Denmark
K. W. Jacobsen
Affiliation:
Center for Atomic-scale Materials Physics and Department of Physics, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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Abstract

Using atomistic simulations we investigate the annihilation of screw dislocation dipoles in Cu. In particular we determine the influence of jogs on the annihilation barrier for screw dislocation dipoles. The simulations involve energy minimizations, molecular dynamics, and the Nudged Elastic Band method. We find that jogs on screw dislocations substantially reduce the annihilation barrier, hence leading to an increase in the minimum stable dipole height.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 578: Symposia A/C – Multiscale Phenomena in Materials - Experiments in Modeling , 1999 , 217
Copyright
Copyright © Materials Research Society 2000

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References

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