About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Vacancy Engineering in Metals and Alloys
|
| Presentation Title |
Direct Simulation of Vacancy Transport During Creep Deformation in Coupled Extreme Environments |
| Author(s) |
Aaron Kohnert, Yash Pachaury, Andrea Rovinelli, Laurent Capolungo |
| On-Site Speaker (Planned) |
Aaron Kohnert |
| Abstract Scope |
Creep rupture is often the lifetime limiting concern for structural materials in applications for the current and future energy infrastructure, from conventional fossil fuel plants to fusion blanket materials to fission reactor fuel cladding. The expense of recreating these conditions in the laboratory for extended creep tests motivates advanced modeling tools that can describe the physics of vacancy transport properties that mediate creep, and how this is impacted by extreme environments. We apply dislocation dynamics and crystal plasticity methods with full spatial resolution of vacancy transport equations directly coupled to dislocation climb, grain boundary migration, and other such processes that facilitate creep deformation. By including radiation source terms and interactions with foreign interstitial atoms such as hydrogen, these methods can predict quantitative changes in deformation rates in harsh service conditions compared to the more accessible cases of stress and high temperature alone where data is more abundant. |
| Proceedings Inclusion? |
Planned: |