About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
A CALPHAD Model for Rapid Solidification in Industrial Alloys |
Author(s) |
Christopher A. Hareland, Gildas Guillemot, Paul Martin, Charles-André Gandin, Peter Voorhees |
On-Site Speaker (Planned) |
Christopher A. Hareland |
Abstract Scope |
The advent of additive manufacturing has renewed interest in rapid solidification modeling. The large interface velocities during these processes can result in significant deviations from local interfacial equilibrium, in which the equilibrium phase diagram is no longer applicable. Instead, the interfacial conditions (i.e., temperature and compositions) are given by a system of kinetic equations known as “interface response functions” (IRFs). Herein, we first describe a new set of IRFs incorporating the effect of partial solute drag, which has been shown to be important in recent molecular dynamics simulations, and leads to physically meaningful kinetic constitutive parameters. The IRFs are then coupled with a model of multicomponent dendrite growth, and CALPHAD methodology is used to obtain a full thermodynamic and kinetic treatment of plane-front and dendritic growth during the rapid solidification of concentrated multicomponent alloys. Comparisons with existing theories and applications to the additive manufacturing of industrial alloys will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
ICME, Modeling and Simulation, Solidification |