| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Materials and Components IV
|
| Presentation Title |
Mechanisms-Based Creep-Fatigue Analysis and Alloy Design for Advanced High-Temperature Nuclear Applications |
| Author(s) |
Mahmud Hasan Ovi, Tamim Hossain, Intisher Al-Tahmid Omi, Hoon Lee, James F. Stubbins |
| On-Site Speaker (Planned) |
James F. Stubbins |
| Abstract Scope |
This study develops a mechanisms-based approach for creep-fatigue analysis in Alloy 617, crucial for advanced nuclear systems. We employ extensive experimental investigations across various stress levels and temperatures to comprehensively understand, quantify, and model creep-fatigue damage, considering loading patterns, temperature variations, and microstructural evolution. Our methodology surpasses traditional fatigue with hold-time protocols by sequentially evaluating creep and fatigue loading. We employ cyclic stress-strain tests with Digital Image Correlation (DIC) to investigate stress concentration during testing. Advanced microscopy techniques, including scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM), are used to quantify microstructural changes. These analyses offer insights into critical factors such as precipitation, grain structure, and dislocation morphology. This comprehensive study enhances the understanding of the material behavior of A617 under high-temperature conditions to qualify this alloy for extended service in nuclear applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Mechanical Properties, Characterization |