Berlin 2018 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 7: Modeling and Data Analysis

DY 7.4: Vortrag

Montag, 12. März 2018, 10:45–11:00, BH-N 128

Phase field modeling of diffusion-limited precipitation in multi-component Ni-based superalloys — •Markus Holzinger, Michael Fleck, and Uwe Glatzel — Metals and Alloys , University Bayreuth, Germany

We develop a phase-field model for the simulation of phase transformations in metallic multi-component alloys (Ni-based superalloys) with industry-relevant chemical complexity. This model is built to take into account thermodiffusion, elastic effects and inhomogeneities. The thermodynamic formulation is validated by comparisons to respective CALPHAD equilibrium calculations using the commercial program ThermoCalc. Furthermore, an elastic term is included in the model to account for the misfit stresses as well as elastic inhomogeneities between the two considered phases. We consider the coarsening kinetics of γ′-precipitates in single crystalline Ni-based cast-alloys. Here we show the results of a elastic strain simulation. We also discuss the results in comparison with experiments.