Abstract Scope |
Antiphase boundaries (APBs) significantly impact material properties by influencing dislocation movement and magnetic wall dynamics. Fe3Al, known for its soft magnetic, heat-resistant, and recyclable structural properties, has been extensively studied for its ordering kinetics. The Allen-Cahn equation, incorporating the gradient energy coefficient, links ordering mobility to interface mobility, which is derived from the time evolution of order parameters measured via XRD. This study evaluates the growth kinetics of D03-ordered domains in Fe3Al using intermittent TEM observations during heat treatment. The research successfully compares 2D and 3D phase-field simulations of APD growth, establishing a shape coefficient linking randomly oriented 3D domain growth to ideal 2D circular domain shrinkage. The derived ordering mobility values align closely with traditional XRD methods, providing a robust foundation for optimizing Fe3Al's heat treatment to enhance its superelasticity through APB and dislocation interactions. [Reference: Liu et al. Acta Mater., 273, (2024), 119958.] |