About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Fatigue Crack Initiation in Very High Cycle Fatigue of C103 |
Author(s) |
Madeline K. Vailhe, Chris Torbet, Leah Mills, Tresa Pollock |
On-Site Speaker (Planned) |
Madeline K. Vailhe |
Abstract Scope |
C103, a niobium based refractory alloy, is primarily used in aerospace applications for sustained high temperature operating environments, such as aerospace propulsion systems. There is limited knowledge of the performance of this alloy under cyclic loading conditions. We aim to gain a fundamental understanding of how slip events develop in C103 and how they escalate to form fatigue cracks during cyclic loading. Ultrasonic fatigue has been employed to study properties in the very-high cycle fatigue (VHCF) regime. At the low stress amplitudes of VHCF, the initiation process for cracks occupies a large fraction of fatigue life and is thus life controlling. These crack initiation sites are linked to slip localization during cyclic loading and emerge from particular microstructural features. Information on how instabilities form and are connected to crystallographic neighborhood configurations will be presented. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, High-Temperature Materials, Other |