Nonequilibrium Interface Dynamics:
Hierarchical Modeling and Multiscale Simulation of Materials Interfaces

CSIC Building (#406), Seminar Room 4122.
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Metastability and Microstructure in Structural Phase Transformations

Dr. Mitchell Luskin

Department of Mathematics at University of Minnesota

Abstract:   Martensitic crystals undergo a first order structural phase transformation between a high symmetry crystalline phase and several variants of a low symmetry crystalline phase (such as the cubic to monoclinic transformation in some CuAlNi alloys) These crystals are observed to be in metastable states exhibiting a fine-scale spatial oscillation between the variants of the low symmetry phase, and hysteresis is observed as the temperature or boundary conditions are varied. We will present computational methods and a numerical analysis for this microstructure, and we will discuss several multiscale methods and the different metastable states that they compute.