|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials Research in Reduced Gravity
||Simulation of Shrinkage-induced Segregation in Multicomponent Multiphase Alloys during Reduced-gravity Solidification
||Ali Saad, Charles-André Gandin, Michel Bellet, Thomas Volkmann, Dieter Herlach
|On-Site Speaker (Planned)
Segregation is a key phenomenon responsible for altering alloys’ properties during solidification. The factors that lead to solute partitioning at the scale of the whole alloy are related to a movement of liquid and solid phases. However, when considering a reduced gravitational field, convection forces become less significant compared to other factors. Consequently, predicting segregation in this context requires considering other prevailing driving forces, namely solidification shrinkage that arises from the density difference between the liquid and solid phases.
In this ESA project called CCEMLCC, we propose a numerical model that accounts for energy conservation via a thermodynamic database, together with fluid momentum conservation and species conservation to predict segregation driven by solidification shrinkage in a multicomponent alloy. We apply it on a specific steel grade for which reduced-gravity experiments were performed via parabolic flights.
||Planned: A print-only volume