An assessment of the elemental segregation in equimolar AlCuFeMn medium-entropy alloy using cluster expansion and Monte Carlo simulation

The present work aims to investigate the chemical segregation behaviour as a function of temperature in a multi-principal-component medium entropy AlCuFeMn alloy. Earlier studies have confirmed that AlCuFeMn possesses multiple phases and two distinct chemical regions: Cu-rich and Fe-Mn-rich. In the present work, we have applied cluster expansion-based Monte Carlo simulations to analyse the short-range ordering vis-à-vis segregation analysis in AlCuFeMn alloy. The theoretical prediction was found to be aligned with experimental observations. The methodology employed in this study offers a systematic approach for analysing elemental segregation behaviour in medium entropy alloys.