The phase separation in Ni75AlxV25-x alloys incorporated with the elastic stress was investigated using the microscopic phase-field model. The final morphology ofγ' andθis similar in spatial alignment, but the volume fraction ofγ' phase increases and that ofθdecreases as the Al concentration increases. For the small elastic interactions of early-stage phase separation, the coarsening ofγ' andθcan be approximated by a linear growth law as predicated by Lifshitz and Slyozov and Wangner (LSW) theory. As the elastic interactions increase at late-stage coarsening, the growth rate decreases, and the growth presents quick increase at early-stage and slows down at late-stage.
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