Kinetic Monte Carlo Simulation of Dislocation Dynamics
Abstract
Dislocation dynamics in materials with medium to large stacking fault energies are studied using a kinetic Monte Carlo based simulation. The dislocations are assumed to be comprised of discrete segments of either pure screw or pure edge character, and their associated configuration energies are calculated within isotropic elasticity theory. The dependence of dislocation velocity on applied stress and sample temperature is explored. Structural features of the dislocations at the mesoscopic level are examined in the context of their relevance to macroscopic mechanical properties. Results relating to internal friction measurements and the role of the Peierls energy as a barrier to dislocation motion are also presented. This work is supported by the US DOE, Office of Basic Energy Sciences, under contract DE-AC03-76SF00098.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 1997
- Bibcode:
- 1997APS..MAR.Q2704L