| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Very High Cycle Fatigue Behavior of BCC Refractory Alloy C103 |
| Author(s) |
Madeline K. Vailhe, Leah Mills, Jean-Charles Stinville, Chris Torbet, Tresa Pollock |
| On-Site Speaker (Planned) |
Madeline K. Vailhe |
| Abstract Scope |
The need for advances in aerospace propulsion continues to drive operating temperature increases. BCC refractory metals and more complex refractory alloys are of interest for these systems, but while most propulsion applications are subject to cyclic loading, there is relatively limited knowledge of their fatigue behavior. The aim of this investigation is to gain a fundamental understanding of how fatigue damage develops in C103, the most commonly used BCC niobium-based refractory alloy, and how it escalates to form fatigue cracks during cyclic loading. Ultrasonic fatigue was employed to study properties in the very high cycle fatigue (VHCF) regime of wrought as well as additively manufactured C103. Comparisons between fracture behavior of differently processed C103 will be provided as well as how strain rate sensitivity affects mechanical properties due to differences in frequency from higher rate testing. Additionally, the heterogeneity of deformation due to cyclic loading will be examined. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Mechanical Properties, Additive Manufacturing |