A thermodynamical model for concurrent diffusive and displacive phase transitions

TL;DR

This paper introduces a thermodynamically consistent model that captures both diffusive and displacive phase transitions using fundamental thermodynamic principles and coupled governing equations.

Contribution

It presents a novel unified framework combining diffusive and displacive phase transitions within a thermodynamic setting.

Findings

Model ensures thermodynamic consistency.

Governing equations include first law, momentum balance, and Cahn-Hilliard.

Framework applicable to complex phase transition simulations.

Abstract

A thermodynamically consistent framework able to model either diffusive and displacive phase transitions is proposed. The first law of thermodynamics, the balance of linear momentum equation and the Cahn-Hilliard equation for solute mass conservation are the governing equations of the model, which is complemented by a suitable choice of the Helmholtz free energy and consistent boundary and initial conditions.