| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Meeting Materials Challenges for the Future of Fusion Energy
|
| Presentation Title |
Modeling of Dislocation Loop Evolution in Iron Through Kinetic Monte Carlo |
| Author(s) |
Anthony Francis Tom, Dwaipayan Dasgupta, Brian Wirth |
| On-Site Speaker (Planned) |
Anthony Francis Tom |
| Abstract Scope |
Ferritic-martensitic (FM) steels are one of the leading candidates for use as structural materials in fusion reactors. Under that fusion relevant irradiation environment, both a/2<111> and a<100> dislocation loops are formed in FM steel and the impact of helium/dpa ratio on the population fraction of each type of loop is very strong. Previously molecular dynamics (MD) based studies provided insights about the loop formation and growth but the exact formation mechanism for a<100> loops remained unsolved and the time scale to observe the loop formation is beyond the reach of MD simulation. We have used Kinetic Monte Carlo method (Stochastic Parallel PARticle Kinetic Simulator or SPPARKS in short) to study the loop formation and growth mechanism at the relevant spatiotemporal scale. An off-lattice Metropolis KMC method was used in the work, with and without the presence of helium clusters in the system. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Iron and Steel, Nuclear Materials |