| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Materials and Components IV
|
| Presentation Title |
Predicting irradiation creep behavior of T91 steel using a physics-based crystal plasticity model |
| Author(s) |
Vignesh Vivekanandan, Aaron Kohnert, Andrea Rovinelli, Laurent Capolungo |
| On-Site Speaker (Planned) |
Vignesh Vivekanandan |
| Abstract Scope |
Understanding the irradiation creep response of a material system at high temperatures and stresses is essential to evaluating the material’s performance in nuclear reactors. The difficulty in obtaining experimental data that captures irradiation creep response in service conditions warrants the development of advanced mechanistic models. In this work, a new crystal plasticity framework that couples the dislocation mechanisms related to plastic deformation with a spatially resolved point defect transport model is proposed to predict the irradiation creep behavior of T91 steel. The framework accounts for the interaction of dislocation with solutes, grain boundaries, precipitates and point defects, which is essential to study the importance of irradiation creep mechanisms like stress induced preferential absorption (SIPA). Finally, the model is compared and calibrated with available post-irradiation (ex-situ) experimental data of T91 steel and subsequently used to predict the in-situ irradiation creep response relevant to advanced nuclear reactor operating conditions. |
| Proceedings Inclusion? |
Planned: |