Phase-field simulation for the effect of atomic interchange energy on the incubation time of Ni₇₅Al_xV_25-x alloy

Based on the microscopic phase-field model, the effects of atomic interchange energy on the incubation time for Ni₇₅Al_xV_25-x alloy have been researched, and the long range parameter's evaluation formula has obtained according to the formula for occupation probability by Khachaturyan. The experiment result shows that when the DO₂₂ phase is deposited firstly, the first-nearest atomic interchange energy between Ni-Al (namely V_Ni-Al) increases, the incubation time of L1₂ phase is shortened, but the incubation time of DO₂₂ phase has no obvious change; and the first-nearest atomic interchange energy between Ni-V (namely V_Ni-V) increases, the incubation time of L1₂ phase and DO₂₂ phase is shortened. When the L1₂ phase is deposited firstly, the V_Ni-Al increases, both the incubation time of L1₂ phase and DO₂₂ phase are shortened, and the V_Ni-V increases, the incubation time of L1₂ phase has no obvious change, and the incubation time of DO₂₂ phase is shortened.