ABSTRACT

The equilibrium diagrams determine the principal possibility of formation of one or another phase in the given external conditions, the fundamental possibility of occurrence of certain phase transformations when these external conditions change. The implementation of these features is determined by the kinetics of phase transformations. Very often it turns out that due to the kinetic reasons the metastable equilibrium forms instead of a stable one and metastable phases appear. The structure of the transformation products, and, consequently, their properties are also largely conditioned by the mechanism and kinetics of transformations.