Phase-Field Simulation of D03-Type Antiphase Boundary Migration in Fe3Al with Vacancy and Solute Segregation
Segregation of solute atoms and vacancies to migrating D03–type antiphase boundaries (APBs) in Fe3Al of the stoichirometric and an Al-rich compositions has been investigated in detail by a phase-field method developed in the previous study [Koizumi et al. Acta Mater 2009;57:3039] focusing on the quantitative relationship among the segregation, APB energy, driving-force, drag-force and APB mobility. It has been revealed that the drag-force by solute segregation depends considerably on the alloy composition and is responsible for the significant composition dependence of the migration kinetics of D03-APB whereas the composition dependences of driving-force and mobility are negligibly small.
Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson
Y. Koizumi et al., "Phase-Field Simulation of D03-Type Antiphase Boundary Migration in Fe3Al with Vacancy and Solute Segregation", Solid State Phenomena, Vols. 172-174, pp. 1313-1319, 2011