Study for the effect of strain energy on two-phase precipitation and Atoms occupying in Ni _68.2Al _22.7V _9.1 alloy using the microscopic phase-field method

The effect of strain energy on Two-phase precipitation and Atoms occupying in Ni _68.2Al _22.7V _9.1 alloy was studied, using the microscopic phase-field method. It is found that the strain energy significantly extend the precipitation process of L1 ₂ phase, and restrain the precipitation of DO ₂₂ phase. As DO ₂₂ phase decreases, the occupation probability of V atom at different sites in L1 ₂ phase increases, and the higher the strain energy, the greater the chance of occupying. The effect of strain energy on occupation probability of Al atom at α ₁ site in L1 ₂ phase is little, only a small reduction in amplitude, but it significantly reduces occupation probability of Al atom at α ₂ site and β site. In all cases, the occupation probability of V atom at β site in L1 ₂ phase is always higher than that at α site.