Effect of Interface Energy Anisotropy on Thermal Stability and Transformation of Lamellar Structures. I. Behaviour of Two‐Phase Systems under Annealing as Related to Particle Shape Equilibrium

Abstract

Thermodynamical regularities determining the occurrence of this or that shape of a particle and its stability at high temperatures are analyzed on the basis of a comparison of the calculated values of interface energies of sphere and disk. The thermodynamical stability of lamellar and spherical shapes is found to be determined by the level of interface energy anisotropy. Peculiarities of phase morphology changes in two-phase systems during annealing, predicted on this basis, agree with the experimental data.

The Effect of β Stabilizers on the Structure and Energy of α/β Interfaces in Titanium Alloys

“…[6][7][8] For example, the lamellar shape of the a phase constituent in the b matrix in titanium alloys and the high stability of the lamellar structure during heat treatment are usually associated with the low energy of the broad face of a platelets and the high level of interface-energy anisotropy. [4,[7][8][9][10][11][12] There are no direct methods for measuring the energy of interfaces between different phases in multiphase alloys. Therefore, indirect methods or theoretical calculations are often used.…”