Dynamic recovery observed in distinct grains within a polycrystalline nickel-based superalloy during cyclic high temperature fatigue via high energy X-ray diffraction microscopy

Sven Gustafson; Darren Pagan; Paul Shade; Michael Sangid

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Dynamic recovery observed in distinct grains within a polycrystalline nickel-based superalloy during cyclic high temperature fatigue via high energy X-ray diffraction microscopy

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. A low solvus, high refractory (LSHR) sample with 252 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.

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Metadata

Work Title	Dynamic recovery observed in distinct grains within a polycrystalline nickel-based superalloy during cyclic high temperature fatigue via high energy X-ray diffraction microscopy
Access	Open Access
Creators	Sven Gustafson Darren Pagan Paul Shade Michael Sangid
Keyword	Thermomechanical fatigue microstructure X-ray diffraction recovery synchrotron radiation
License	CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
Work Type	Article
Acknowledgments	NSF CMMI 16-51956 NSF DMR-1829070
Publisher	Scripta Materialia
Publication Date	October 12, 2020
Publisher Identifier (DOI)	10.1016/j.scriptamat.2020.10.004
Related URLs	https://doi.org/10.1016/j.scriptamat.2020.10.004
Deposited	February 25, 2021

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Dynamic recovery observed in distinct grains within a polycrystalline nickel-based superalloy during cyclic high temperature fatigue via high energy X-ray diffraction microscopy

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View: gustafson_ScriptaMat_DynamicRecovery_final.pdf

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Dynamic recovery observed in distinct grains within a polycrystalline nickel-based superalloy during cyclic high temperature fatigue via high energy X-ray diffraction microscopy

Files

View: gustafson_ScriptaMat_DynamicRecovery_final.pdf

Metadata

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Collections

Work History

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