| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
The Effect of Point Defects on the Thermodynamics and Kinetics of Irradiated Materials |
| Author(s) |
Thomas Schuler, Maylise Nastar |
| On-Site Speaker (Planned) |
Thomas Schuler |
| Abstract Scope |
Irradiation creates a supersaturation of point defects in materials, and their interaction with atoms leads to various phenomena that we are now able to understand and quantify using state-of-the art modeling tools. For instance, irradiation can trigger precipitate dissolution when point defects stabilize solutes in the solid solution. This thermodynamic mechanism is very different from the well-known kinetic “ballistic” dissolution mechanism. When the precipitate density differs significantly from the matrix density, point defects will have a huge effect on precipitation sequences as they provide the additional space or lattice sites required to grow the precipitate phase. These two examples show that thermodynamics under irradiation is far more subtle than equilibrium thermodynamics. Also, kinetic effects must not be neglected. For instance solute-point defect flux coupling can, over time, suppress the recombination enhancement due to solute addition. We will discuss these phenomena and how we model them. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |