Computational Modeling of Softening in a Structural Phase Transformation

Authors

Pavel Bělík, Augsburg UniversityFollow
Mithcell Luskin, University of Minnesota - Twin Cities

Document Type

Article

Publication Date

2004

DOI

10.1137/040604339

Abstract

We develop a free energy density to model a structural first-order phase transformation from a high-temperature cubic phase to a low-temperature tetragonal phase. The free energy density models the softening of the elastic modulus controlling the low-energy path from the cubic to the tetragonal lattice, the loss of stability of the tetragonal phase at high temperatures and the loss of stability of the cubic phase at low temperatures, and the effect of compositional fluctuation on the transformation temperature.

Numerical experiments are given for the quasi-static cooling and heating of a single crystal thin film through the transformation. Tweed-like oscillations are obtained as precursors to the structural phase transformation.

Comments

The final version of this article appeared in Multiscale Modeling & Simulation at https://doi.org/10.1137/040604339

Recommended Citation

Bělík, Pavel and Luskin, Mithcell, "Computational Modeling of Softening in a Structural Phase Transformation" (2004). Faculty Authored Articles. 7.
https://idun.augsburg.edu/faculty_scholarship/7