About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
High-throughput Characterization of Small Crack Growth Behavior in Ti-6-4 |
Author(s) |
Michelle E. Harr, Bradley Rucker, Ayman A. Salem, Adam L. Pilchak, T. Broderick, S.I. Rao |
On-Site Speaker (Planned) |
Michelle E. Harr |
Abstract Scope |
Short crack growth rates are highly stochastic, with short cracks propagating significantly faster than long cracks with similar stress intensities. This anomalous behavior is hypothesized to be related to the local microstructure, but there are no known mechanistic links. We seek to understand microstructural effects on short crack growth behavior in Ti-6Al-4V by developing and utilizing an automated, high throughput fatigue crack growth system. Towards this goal, we have (1) designed and validated a novel combined optical monitoring and bending fatigue system; (2) developed a motion detection-based crack measurement method; and (3) implemented this system to investigate the crystallographic orientation dependence of small crack growth in Ti-6Al-4V. Results comparing traditionally measured small crack data and data collected with the high-throughput, optical measurement system will be discussed toward the goal of investigating the effect of local microstructure on short crack growth rates in Ti-6Al-4V. |
Proceedings Inclusion? |
Planned: |