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Atomic-Scale Simulation of Grain Boundary Kinetics during Recrystallization

Published online by Cambridge University Press:  15 March 2011

Z. Trautt  and
M. Upmanyu
Z. Trautt
Affiliation:
Group for Simulation and Theory of Atomic-scale Material Phenomena (stAMP) Department of Physics, Colorado School of Mines, Golden, CO 80401 Engineering Division, Colorado School of Mines, Golden, CO 80401
M. Upmanyu
Affiliation:
Group for Simulation and Theory of Atomic-scale Material Phenomena (stAMP) Engineering Division, Colorado School of Mines, Golden, CO 80401 Materials Science Program, Colorado School of Mines, Golden, CO 80401.
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Abstract

We present two-dimensional molecular dynamics (MD) simulations of symmetric tilt grain boundary kinetics, driven by stored energy of deformation. The latter is introduced by prescribing a well-defined gradient in dislocation density across a flat grain boundary. Bicrystals simulations reveal that the boundary motion, albeit jerky, increases linearly with simulation time. We also employ a control simulation to extract the driving force for motion, which then yields a unique boundary mobility. Preliminary comparisons with curvature driven boundary migration for misorientations 30° and 22.78° suggest that misorientation dependence of boundary migration is significantly less anisotropic, in turn implying that the mechanism of motion itself is different.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 819: Symposia N/P – Interfacial Engineering for Optimized Properties III , 2004 , N6.7
Copyright
Copyright © Materials Research Society 2004

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