About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Qualification Methods for Nuclear Reactor Structural Materials
|
| Presentation Title |
Mechanisms-Based Creep-Fatigue Analysis of Alloy 617 for Advanced High-Temperature Nuclear Applications |
| Author(s) |
Tamim Hossain, Mahmud Hasan Ovi, Intisher Al-Tahmid Omi, Silvana Tabares Burgos, Hoon Lee, James F. Stubbins |
| On-Site Speaker (Planned) |
James F. Stubbins |
| Abstract Scope |
The objective of this research is to quantify and model damage caused by creep-fatigue interactions in A617. With experimental investigations across a spectrum of stress levels, loading patterns and temperatures, we are developing a mechanisms-based approach for creep-fatigue analysis for extending the ASME allowable high-temperature service limits. Elevated temperature mechanical testing and evolution of deformation microstructures will be supplemented by crystal plasticity modeling. This approach can be extended to component-level deformation analysis, marking significant advancement beyond current analysis methods reliant on fatigue with hold-time. Our study employs a novel approach, sequentially evaluating creep and fatigue loading, to better understand creep-fatigue interaction. Cyclic stress-strain tests at high-temperatures coupled with Digital Image Correlation(DIC) are used to monitor stress concentration and relaxation during testing. Microstructural evolution has been performed to distinguish the separate and combined effects of creep and fatigue loading. This methodology can be applicable for qualification of other high-temperature structural alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, Mechanical Properties |