Cross-slip of screw dislocations and the annihilation of screw dislocation dipoles in Cu were simulated using constant-temperature constant-stress molecular dynamics. The cross-slip mechanism and annihilation process of flexible dislocations in a large dipole configuration was identified as a dynamic variant of the Friedel-Escaig mechanism. The cross-slip rate was found to exhibit exponential dependence on the temperature, from which the activation enthalpy for the cross-slip process was calculated by the Arrhenius relation.
|Number of pages||3|
|Journal||Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing|
|Issue number||1-2 SUPPL.|
|State||Published - 25 Jul 2005|
- Molecular dynamics