Phase-field study the effect of elastic strain energy on the incubation period of Ni–Cr–Al alloys

Abstract

With the microscopic phase-field dynamic model, the effect of elastic strain energy on the incubation period of Ni–Cr–Al alloys is studied. The simulation results demonstrate that elastic strain energy does not change the precipitation sequence of alloys. There exits the incubation period of DO 22 phase and L1 2 phase in the alloys with different precipitation sequence. If DO 22 phase precipitates first, the incubation periods of both phases are prolonged with the elastic strain energy increased. If L1 2 phase precipitates first, with the increase of elastic strain energy, the incubation periods of L1 2 phase is shortened while that of DO 22 phase is prolonged.