About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Qualification Methods for Nuclear Reactor Structural Materials
|
| Presentation Title |
Coupled Evolution of Spinodal Decomposition and grain boundary Radiation-Induced Segregation in model austenitic alloys |
| Author(s) |
Daniele Fatto Offidani, Yitao Wang, Marie Thomas, Suveen Mathaudhu, Fadi Abdeljawad, Enrique Martinez, Emmanuelle Marquis |
| On-Site Speaker (Planned) |
Daniele Fatto Offidani |
| Abstract Scope |
Exposure to irradiation or extreme environments can drive a range of complex changes in alloy microstructures, affecting their performance and long-term stability. In this study, two model austenitic Fe-Ni-Cr alloys were subjected to ion irradiation at 400 °C over doses ranging from 2 to 70 dpa to investigate the development of radiation-induced segregation (RIS) at grain boundaries and concurrent spinodal decomposition within grain interiors. Rather than reaching a steady state at low doses, grain boundary chemistry was found to evolve together with increasing phase separation in the bulk as the irradiation dose increased. This coupling challenges assumptions about the early stabilization of RIS and emphasizes the interconnected nature of microstructural evolution under irradiation. These insights enhance our understanding of alloy behavior in extreme environments and highlight the importance of considering the evolution of the grain interior and microstructural interfaces when characterizing radiation damage. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Iron and Steel, Environmental Effects |