About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Defects and Interfaces: Modeling and Experiments
|
Presentation Title |
Elucidating Grain Boundaries in Irradiated FeCr Alloys Using Multiscale Modeling and High-resolution Characterization |
Author(s) |
Mukesh Bachhav, Sourabh Kadambi, Boopathy Kombaiah, Jia-Hong Ke |
On-Site Speaker (Planned) |
Mukesh Bachhav |
Abstract Scope |
Grain boundaries (GBs) studies are crucial for understanding radiation resistant properties in structural materials as well as to understand their mechanical properties and oxidation/corrosion behavior. Under irradiation, GB sink play influential role in determining migration tendencies of vacancies and self-interstitials. However, in the presence of sustained point defect fluxes, the coupled transport of atomic elements with inherently different diffusivities often leads to radiation-induced segregation (RIS). In this work, we investigate the fundamental mechanisms of GB segregation in BCC FeCr-based alloys using multiscale modeling and experiments. A phase-field model is employed to account for both thermodynamic and kinetic segregation mechanisms. Atom probe and transmission electron microscopy studies are carried out on as-received and irradiated Fe-Cr alloys to elucidate role of grain boundary strength in RIS tendency of solute elements. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Nuclear Materials, Iron and Steel |