Density Differences’ Effect on Phase Transition Kinetics

In this theoretical study, we investigate the impact of density differences between the growing new phase and the parent phase on the overall transformation degree. By extending Kolmogorov's formalism, we derive an expression for the overall volume transformation degree, which becomes relevant when density differences are not negligible. We demonstrate that the volume and mass transformation degrees differ in the presence of density differences and provide an expression for the mass transformation degree.