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

Abstract

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 m 3 ·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 solutedrag which was quite significant at B2-APB.

Spinodal Decomposition in Plastically Deformed Fe–Cr–Co Magnet Alloy

“…Thus, in the present study, we have investigated the differences between the decomposed microstructures formed in the two cases of without rolling (hereafter, denoted by "non-rolled") and with rolling (hereafter, denoted by "rolled") to reveal the effects of dislocations introduced by cold-rolling on the spinodal decomposition of Fe-Cr-Co alloys. In addition, we performed phase-field simulations [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] to discuss the formation mechanisms of the experimentally observed microstructures in terms of defects induced by plastic deformations as a path for rapid diffusion.…”