Evaluation of Ordering Mobility from Antiphase Boundary Mobility in Fe₃Al Using Phase-field Simulation

抄録

Determination of the mobilities for ordering transformation in Fe₃Al has been attempted by comparing the rates of experimentally observed antiphase boundary (APB) migration with that simulated by a phase filed method (PFM). The simulated boundary mobility of D0₃-APB was sensitive to the ordering mobility. This allowed us to determine the ordering mobility for D0₃-LRO at 673 K to be 3 × 10^–11 m³·J^–1·s^–1. However, the simulated boundary mobility of B2-APB was insensitive to the value of ordering mobility, and therefore the ordering mobility for B2-LRO could not be determined. The difference is ascribed to solute-drag which was quite significant at B2-APB.