About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Dynamic Recovery Observed in Distinct Grains Within A Polycrystalline Nickel-based Superalloy During Cyclic High Temperature Loading via High Energy X-ray Diffraction Microscopy |
Author(s) |
Sven E. Gustafson, Darren Pagan, Paul Shade, Michael Sangid |
On-Site Speaker (Planned) |
Sven E. Gustafson |
Abstract Scope |
Predictions of thermo-mechanical deformation and associated residual stress states are limited by the sparseness of in-situ, 3D grain and sub-grain scale data to investigate the underpinning mechanisms. To further this investigation, elastic micromechanical fields are tracked for a nickel-based superalloy polycrystal via high energy X-ray diffraction microscopy (HEDM) and corresponding intragranular deformation metrics are determined with peak broadening analysis during cyclic high temperature loading. An LSHR sample with over 250 grains was subjected to uniaxial tension and held under fixed displacement while thermally cycling between 460°C and 770°C, with intermittent HEDM characterization to study the grain average response to thermo-mechanical deformation. Elevated temperatures were found to allow for heterogeneous amounts of recovery amongst distinct grains within the sampled region, indicating complex grain interactions; the extent of recovery was greater at higher temperatures. |
Proceedings Inclusion? |
Planned: |