Abstract
High temperature materials such as nickel-base superalloys and titanium alloys are used in the compressor and/or the turbine of a jet engine. Multiscale multiphysics simulations to be used for development of such high temperature alloys, which combine theoretical and empirical methods, are described in this paper. In addition, a new phase-field method coupling with the CALPHAD method to simulate gamma-prime precipitation of multicomponent Ni-base superalloys in two dimensions is proposed as part of the multiscale multiphysics simulations. This phase-field method demonstrates both diffusion-controlled precipitate growth under local equilibrium at phase interfaces and precipitation interaction such as coalescence.
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