| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments II
|
| Presentation Title |
Determining the Spatial Distribution of Primary Radiation Damage in Nanostructured Materials |
| Author(s) |
Matt Brand, Patrick Burr, Edward Obbard |
| On-Site Speaker (Planned) |
Matt Brand |
| Abstract Scope |
Current methods for calculating the primary radiation damage of materials, such as the NRT-dpa and arc-dpa theories, rely on the assumption that the material is homogeneous. For nanostructured materials and composites, this assumption is inadequate as it neglects that primary knock-on atoms (PKAs) interact differently with different phases. We have developed a theory which combines the NRT formalism with binary collision approximation (BCA) simulations to calculate the distribution of primary radiation damage within a nanostructured material. Application of our technique to ferritic superalloys shows that the dpa can vary by up to 30% from one phase to another, and up to 7% within a single phase. We can use this method to engineer composites where radiation damage is localised in one (more tolerant) phase. Furthermore, we show that attempting to account for heterogeneity by treating the constituent phases of a nanostructured alloy separately leads to a qualitatively wrong answer. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Modeling and Simulation, Nuclear Materials |