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 |
Investigation of Irreversible Slip and Intragranular Lattice Rotations in Polycrystalline Inconel 718 during Cyclic Loading |
Author(s) |
Justine Schulte, Jonathan Hestroffer, Dalton Shadle, Kelly Nygren, Matthew Miller, Tresa Pollock, Irene Beyerlein |
On-Site Speaker (Planned) |
Justine Schulte |
Abstract Scope |
Fatigue is a life-limiting property for many structural aircraft engine materials. To design better alloys for this application, it is necessary to understand the slip behavior that precedes crack initiation on a sub-grain level. Intragranular lattice rotation gradients can serve as an indicator of slip activity and, in cyclic loading, the connection between the irreversibility of these gradients and irreversible slip can be examined. In this study, 3D crystal plasticity finite element (CPFE) modelling is coupled with in-situ high energy x-ray diffraction microscopy (HEDM) data to link intragranular lattice rotation gradients with slip processes within polycrystalline Inconel 718 during cyclic loading. These complementary techniques provide information on the spatially resolved lattice rotation gradients, slip activity, stress and strain states within the microstructure. The links between these quantities can ultimately determine which intragranular rotation gradients are irreversible, and thus identify potential sites for crack initiation and their dependence on microstructural features. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Modeling and Simulation, Copper / Nickel / Cobalt |