About this Abstract |
Meeting |
2024 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 |
Development of Irreversible Intragranular Orientation Gradients and Slip Processes During Cyclic Loading in Polycrystalline Inconel 718 |
Author(s) |
Justine Schulte, Jonathan Hestroffer, Dalton Shadle, Kelly Nygren, Matthew Miller, Tresa Pollock, Irene Beyerlein |
On-Site Speaker (Planned) |
Justine Schulte |
Abstract Scope |
To design alloys with improved fatigue resistance for aerospace applications, it is necessary to understand the slip events that precede crack initiation on a sub-grain level, particularly, irreversible slip as it is linked to fatigue damage. Intragranular lattice rotations may result in orientation gradients that can indicate the slip activity, and, during cyclic loading, their irreversibility can be connected to irreversible slip. To study these connections, crystal plasticity finite element (CPFE) modeling is coupled with in-situ high energy x-ray diffraction microscopy (HEDM) in polycrystalline Inconel 718 during cyclic loading. Intragranular orientations and grain-average elastic strains can be compared directly between the model and experiment, with CPFE providing links to slip activity. Ultimately, the location of these irreversible gradients can be linked back to microstructural features. |
Proceedings Inclusion? |
Planned: |