About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments IV
|
| Presentation Title |
Grain Boundary Segregation and Nanoscale Precipitation in Fe-Based Alloys |
| Author(s) |
Ariel Capote Sanchez, Kyle Russell, Jason Trelewicz, Andrea M. Hodge |
| On-Site Speaker (Planned) |
Ariel Capote Sanchez |
| Abstract Scope |
Nanostructured metallic alloys offer exceptional mechanical and irradiation resistant properties. However, their engineering applications at elevated temperatures are limited by low thermal stability, which can be attributed to the volumetric density of grain boundaries. Stabilization methods, such as solute segregation to grain boundaries and precipitate pinning effects, have been explored as viable strategies to retain nanoscale features. While recent efforts have focused on identifying thermally stable systems through experimental and computational models, few studies directly consider the possible competition between stabilization mechanisms. In this work, magnetron sputtered Fe-W and Fe-Zr alloys were used to deconvolute the thermal stability pathways. Microstructural analysis of annealed films revealed differences in intergranular precipitation, nanoscale oxidation, and grain boundary segregation. The observed discrepancies in solute behavior are analyzed through the lens of competing thermodynamic driving forces and mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, |