Coupled Computer Simulations of Recrystallization in Deformed Polycrystals

Abstract:

Because both nucleation and growth are local phenomena, recrystallization depends on the spatial distribution of strains in a plastically deformed polycrystal. Using a polycrystal plasticity finite element model, we calculated these distributions for equiaxed polycrystals of copper with a random texture. We incorporated the results into a mesoscale recrystallization simulation with a nucleation model based on subgrain evolution. The coupled simulation results indicate that differences in local structure cause significant differences in recrystallization kinetics and grain size distribution. Furthermore, recrystallization in non-uniformly deformed polycrystals, even those with a random texture, is quantitatively and qualitatively different than predicted by continuum models that assume a uniform distribution of strains. This work highlights the need to examine all length scales relevant to the recrystallization process.

• Periodical: Materials Science Forum (Volumes 467-470)
• Pages: 641-646
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.467-470.641
• Online since: October 2004
• Authors: Elizabeth A. Holm, Kristopher J. Healey, Corbett C. Battaile
• Keywords: Computer Simulation, Grain Size Distribution, Growth, Micromechanics, Nucleation, Plasticity, Recrystallization, Transformation Kinetics

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