| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
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| Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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| Presentation Title |
Monitoring Crystal-scale Evolution in Real-time using In-situ High Energy Diffraction Microscopy and Principal Component Analysis |
| Author(s) |
Dalton Shadle, Kelly Nygren, Matthew Miller |
| On-Site Speaker (Planned) |
Dalton Shadle |
| Abstract Scope |
Designing fatigue-resistant polycrystalline metals remains a significant challenge due to the complex and evolving processes that drive microscopic crack initiation. Fortunately, in-situ experimental techniques, like high energy diffraction microscopy (HEDM), usher in new opportunities to collect the temporally-resolved, crystal-scale data necessary for understanding these processes. Yet measurement collection times strongly dictate the temporal resolution of HEDM, which typically inhibits HEDM from being considered truly real-time. In this study, we present a novel framework for monitoring the evolution of a deforming polycrystal, in real-time, by applying principal component analysis (PCA) to raw X-ray diffraction detector data. We apply this framework to an Inconel-718 superalloy cyclically loaded during an in-situ HEDM experiment. We discover correlations between the PCA of the raw diffraction data and the macroscopic and crystal-scale mechanics of the polycrystal. These correlations provide the real-time details needed to “fill-in-the-gaps” between in-situ HEDM measurements to maximize crystal-scale evolution information. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Machine Learning, Mechanical Properties |