About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Grain Boundary Segregation and Solute Drag in Multicomponent Alloys |
Author(s) |
Milad Taghizadeh, Fadi Abdeljawad |
On-Site Speaker (Planned) |
Milad Taghizadeh |
Abstract Scope |
In polycrystalline systems, even minute amounts of solute enrichment at grain boundaries (GBs) greatly influence boundary migration and grain coarsening during processing treatments or under service conditions. However, the impact of GB solute segregation on solute drag in multi-component alloys remains unexplored. Herein, we present a theoretical and computational model of GB segregation and solute drag in multi-component alloys. The model accounts for bulk thermodynamics and the interaction of various elemental species with GBs, and it captures various mass transport processes. Ternary alloys are used as a model system of multi-component effects. Simulation results reveal a plethora of segregation behaviors, including synergistic co-segregation and induced de-segregation, that are dependent on solute-solute interactions within the GB. Further, parametric studies are carried out to identify regimes where solute drag is dominant. Our approach provides avenues to employ GB segregation engineering as a strategy to design novel metallic alloys with tailored microstructures. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Computational Materials Science & Engineering, Other |