Simulation of the precipitation process of Ni₇₅Al_xV_25-x alloys incorporated in the microelasticity field

The microelasticity field was incorporated into the microscopic phase-field equation for the ternary alloy systems, the morphology evolution and coarsening behavior of the Ni₇₅Ai_xV_25-x alloy were simulated. The γ phase precipitates initially for Ni₇₅Al_7.1V_17.9 and Ni₇₅Al_5.5V_19.5 alloys and the two phases transform from the equiaxed or strip-like to the quadrate as the growth and coarsening processes. For the anisotropic elasticity interaction of the system, the orientation of γ is along the 〈001〉 directions and the θ phase is along the short axis direction of [10]. Analysis of the structure and the pair-correlation functions indicate that the average precipitate length scale of the particles increases at the late-stage coarsening, and the dynamical scaling behavior is obeyed.