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Phase Separation and Elastic Fields: Three Dimensional Simulations of a Phase Field Model

  • Daniel Orlikowski (a1), Celeste Sagui (a1), Andrds Somoza (a2) and Christopher Roland (a1)
Abstract

The effects of long-range elastic fields on the phase separation process of three- dimensional binary alloy systems was investigated with large-scale Langevin simulations. The elastic effects incorporated in the model are the result of anisotropy and dilational misfits introduced via inhomogeneities in the elastic constants of the constituents. The domain morphology obtained is readily understandable in terms of selection criterion for the shape and/or orientation of the domains, and is based on the different shear moduli that are present in the system. Coarsening mechanisms were found to be a combination of the classical Ostwald ripening mechanism and the elastically-driven coalescence of domains. Other aspects of the coarsening process such as dynamic scaling of the structure function is presented.

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  • EISSN: 1946-4274
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