About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Chemistry and Physics of Interfaces
|
Presentation Title |
Tailoring the Microstate Thresholds of Grain Boundaries Using Compositional Complexity |
Author(s) |
Annie Barnett, Emily Hopkins Mang, Wei-Ying Chen, Jaime Marian, Michael Falk, Mitra Taheri |
On-Site Speaker (Planned) |
Annie Barnett |
Abstract Scope |
Pure and dilute metallic alloys cannot meet the operating requirements of modern reactors; therefore, it’s necessary to realize differences in defect accommodation and microstate transformations in materials with concentrated amounts of solute to gauge differences in sink efficiency with stoichiometric variation. Molecular Dynamics simulations are used to probe GB structural transitions upon simulated preferential interstitial absorption in fcc bicrystals of increasing chemical complexity. These GB structural transitions affect the long-term structure and chemistry in the bulk, as well as the resulting defect landscape due to cyclic sink efficiency. Using deep learning object detection models, efficiency variation is quantified from in-situ video during irradiation at Argonne National Laboratory. The irradiated GBs were further characterized post-mortem using High-Resolution Transmission Electron Microscopy (HRTEM). Our work demonstrates the continuum of metastable structures available to a GB under irradiation, establishing a relationship between chemistry, dose rate, and efficiency in chemically complex, fcc systems. |
Proceedings Inclusion? |
Planned: |