About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Transmutation Effects in Fusion Reactor Materials: Critical Challenges & Path Forward
|
Presentation Title |
Modeling the Effect of He/dpa Rate on Microstructural Evolution in Ferritic-martensitic Alloys |
Author(s) |
Brian D. Wirth |
On-Site Speaker (Planned) |
Brian D. Wirth |
Abstract Scope |
The impact of He/dpa on microstructural evolution in ferritic - martensitic alloys is very pronounced, both in terms of the bubble/cavity population and the distribution of a/2<111> versus a<100> loops. This presentation will review the available data, and then present results from atomistically-informed cluster dynamics modeling of both prismatic loop evolution as well as that of bubbles and cavities across a range of irradiation temperature and He/dpa ratios. Of particular importance in modeling microstructural evolution is the presence of helium, the partitioning of helium between trapping sites, and the time dependence of helium de-trapping. The presentation will conclude with a comparison between the modeling predictions and experimental data, and a summary of outstanding challenges. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Modeling and Simulation, Nuclear Materials |