| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Qualification of Nuclear Materials Integrating Experiments, Modeling, and Theories
|
| Presentation Title |
E-14: Quantifying the Spatial Distribution of Primary Radiation Damage in Real Materials |
| Author(s) |
Matt Brand, Patrick Burr, Edward Obbard |
| On-Site Speaker (Planned) |
Matt Brand |
| Abstract Scope |
Current macroscopic methods for calculating the primary radiation damage from neutrons, such as the NRT-dpa and arc-dpa theories, rely on the assumption that the material is homogeneous. For many engineering materials, this assumption is inadequate as it neglects that primary knock-on atoms (PKAs) interact differently with different phases. We have developed a theory that combines the NRT formalism with binary collision approximation (BCA) to calculate the distribution of primary radiation damage within a heterogeneous material. Application of our technique to ferritic superalloys shows that the dpa can vary by up to 30% over tens of nm. Similar behaviour is observed in other materials used in nuclear applications. We can use this method to engineer materials with localised primary radiation damage production, and lower overall damage. Furthermore, we show that attempting to account for heterogeneity by treating the constituent phases separately can lead to a qualitatively wrong answer. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Modeling and Simulation, Nuclear Materials |