Atomic density function modeling of microstructure evolution in Ni3−xFex alloys

• The microstructure evolution of Permalloy alloys is modeled using the “atomic density function”-type approach.
• The magnetic and chemical interactions are considered simultaneously in order to reveal the effect of magnetism in studied alloys.
• It is shown that the magnetic interactions help to stabilize the ordered phase and increase the particle coarsening rate and, therefore, accelerate the alloy's kinetics.

The kinetics of the microstructure evolution of Ni3−xFex alloys is studied using numerical simulations based on the microscopic diffusion equation. In particular, the influence of the magnetic interactions on the morphological evolution and coarsening kinetics of ordered L12 precipitates in a fcc disordered matrix is investigated. It is shown, that magnetic interactions increase the width of the miscibility gap and stabilize the L12 ordered phase. The simulated microstructures agree with the experimental data.