About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Frontiers in Solidification: An MPMD Symposium Honoring Jonathan A. Dantzig
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Presentation Title |
About the Solidification Path in Multicomponent Alloys: Multiphase-field Simulations versus Gulliver-Scheil |
Author(s) |
Markus Apel, Bernd Böttger, Bei Zhou |
On-Site Speaker (Planned) |
Markus Apel |
Abstract Scope |
The solidification path, in particular the later stage, is an important attribute for the processing of multicomponent alloys, e.g. a large solidification interval may promote hot tearing.
The standard approach to compute fraction solid as function of temperature is still the Gulliver-Scheil (GS) model. Input for the GS model are solely thermodynamic state variables and GS leads to a unique solution independent on cooling rate and solidification morphology. In contrast, phase-field models explicitly considers diffusion, both in the liquid and solid state.
We compare results from multiphase-field simulations (MPF) for multicomponent alloys with GS-calculations and discuss the impact of cooling rate and solidification morphology, the impact of nucleation undercooling and density of secondary phases, and potential artifacts due to the diffuse PF interface thickness. In consequence, GS and MPF will lead to different estimations for the hot crack susceptibility based on e.g. critical temperature interval criteria or the Kou-criterion. |
Proceedings Inclusion? |
Planned: |
Keywords |
Solidification, Modeling and Simulation, |