|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||CFD Modeling and Simulation in Materials Processing
||On the Importance of Modeling 3D Shrinkage Cavities for the Prediction of Macrosegregation in Steel Ingots
||Andreas Ludwig, Menghuai Wu, Abdellah Kharicha
|On-Site Speaker (Planned)
Three-phase volume averaging columnar and equiaxed solidification models that consider multiphase transport phenomena (mass, momentum, species and enthalpy) are nowa-days in use to calculate the as-cast structure of steel ingots including columnar-to-equiaxed transition and formation of macrosegregation. In order to incorporate the for-mation of a shrinkage cavity in such a model, a supplementary phase (i.e. gas phase or covering liquid slag phase) is taken into account in addition to the previously considered three phases (melt, columnar dendrite trunks and equiaxed grains). No mass and species transfer between the new phase and the other three phases is necessary, but momentum and energy transfer is of critical importance for the formation of the shrinkage cavity, es-pecially in three dimensions. It is shown that with the formation of a shrinkage cavity the flow inside the solidifying ingot changes and with that it also affects the formation of macrosegregation.
||Planned: A print-only volume