|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Frontiers in Solidification Science and Engineering
||Modeling of Eutectic Growth Kinetics in Multicomponent Alloys with Thermodynamic Couplings
||Oriane senninger, Gildas Guillemot, Charles-André Gandin
|On-Site Speaker (Planned)
The formation of eutectic microstructures, composed of two phases or more, is often observed during the solidification of industrial alloys. However, eutectic growth models are currently limited to small undercoolings restricting their use to analyze microstructures generated in industrial processes. Assumptions are also usually made simplifying the phase diagrams properties.
We present a new method to determine eutectic growth kinetics for a large range of growth undercoolings in multicomponent alloys. This model is coupled to thermodynamic computations using the CALPHAD approach. Advantages include taking into account the effect of curvature an undercooling on the interfacial equilibrium and the update of diffusion properties with the kinetics.
An application to ternary three-phase eutectics is presented along with some examples in real systems. This new model is compared to usual approaches of the literature, pointing out the interest of thermodynamic coupling.
||Planned: Supplemental Proceedings volume