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Kinetic modeling of materials coarsening: from individual grains to network statistics

Maria Emelianenko
George Mason University


When microstructure of polycrystalline materials undergoes coarsening driven by the elimination of energetically unfavorable crystals, a sequence of network transformations, including continuous expansion and instantaneous topological transitions, takes place. This talk will be focused on recent advances related to the mathematical modeling of this process. Two types of approaches will be discussed, one aimed at simulating the evolution of individual crystals in a 2-dimensional system via a vertex model focused on triple junction dynamics, and one providing a kinetic Boltzmann-type description for the evolution of probability density functions. The predicted MDF evolution based on the new kinetic mesoscale model will be discussed and contrasted with those obtained by large scale phase field simulations for several classes of interfacial energies.

Thursday, December 1, 2016
11:00AM AP&M 2402