KINETICS OF TWEED AND TWIN FORMATION DURING AN ORDERING TRANSITION IN A SUBSTITUTIONAL SOLID-SOLUTION

A kinetic model based on the theory of strain-induced interactions is developed to describe the effect of elastic strain on structural transformation kinetics. An ordering transition resulting in a reduction in the crystal lattice point-group symmetry in a substitutional solid solution is considered. Our computer simulation of a two-dimensional model binary alloy revealed the detailed kinetics of formation of tweed morphologies and the tweed --> twin coarsening process driven by the transformation-induced elastic strains.