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 |
Grain Scale Deformation Study of a Nickel-based Superalloy under Thermo-mechanical Fatigue Utilizing Crystal Plasticity Simulations and High-energy X-ray Diffraction Microscopy |
Author(s) |
Brandon T. Mackey, Ritwik Bandyopadhyay, Sven Gustafson, Michael D Sangid |
On-Site Speaker (Planned) |
Brandon T. Mackey |
Abstract Scope |
Nickel-based superalloys are used for applications in the hot sections of gas turbines because of their high strength at elevated temperatures. These materials are subjected to complex thermo-mechanical loading due to service conditions which leads to thermo-mechanical fatigue (TMF) failure. The failure mechanisms associated with TMF are dependent on microstructural characteristics and parameters such as temperature, strain range, and strain-temperature phasing. Using microstructural information reconstructed from a high-energy X-ray diffraction microscopy (HEDM) TMF experiment, we generate a temperature-dependent crystal plasticity model for LSHR, a Nickel-based superalloy, to study failure mechanisms associated with TMF. Crystal plasticity predicted damage locations are determined and connected to HEDM grain scale metrics such as slip system activity, spot spreading, and grain neighbor interactions to understand physical mechanisms influencing TMF damage. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, High-Temperature Materials, ICME |