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Phase-field modelling of microstructure evolution in superalloys

Researcher: Nils Warnken

Models are being developed for the prediction of phase transformations (solidification, solid-state precipitation) in nickel-based superalloys. Models making use of the phase-field method are being developed, so that by coupling with CALPHAD simulations for technically relevant alloys become possible. Our challenge is to adopt this new approach to the processing of turbine blade manufacturing, aiming mainly at as-cast microstructure formation and solution heat-treatment. The latter requires a detailed and sound description of the as-cast structure. In the future, heat treatment will be optimised and tailored individually for an alloy or even a specific component.

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