| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defect and Phase Transformation Pathway Engineering for Desired Microstructures
|
| Presentation Title |
Grain Boundary Segregation in Immiscible Alloys: Anisotropy and Trijunction Effects |
| Author(s) |
Anne Barnett, Michael Cox, Derek Moore, Maher Alghalayini, Chris Barr, Khalid Hattar, Brad L Boyce, Fadi Abdeljawad |
| On-Site Speaker (Planned) |
Fadi Abdeljawad |
| Abstract Scope |
Nearly all structural and functional materials are multicomponent polycrystalline systems. In these materials, the interaction of elemental species with grain boundaries (GBs) greatly influences many of their observable properties. In this talk, we present results from atomistic simulations and mesoscale phase field models highlighting the role of GB solute segregation in microstructure development and evolution in immiscible alloys. It is found that the interplay between GB solute segregation and bulk thermodynamics determines the extent of solute partitioning between bulk grains and GBs, thus affecting the resultant microstructures. Further, simulation results supported by recent high-resolution experimental findings highlight the paramount roles of trijunction solute segregation and GB segregation anisotropy in the microstructural evolution of these materials systems. In broad terms, our results provide future avenues to explore interface segregation as a tool to design materials with tailored microstructures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Nanotechnology, Phase Transformations |