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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Verification, Calibration, and Validation Approaches in Modeling the Mechanical Performance of Metallic Materials
Presentation Title Establishing Empirical Repeatability of X-Ray Diffraction Measurements During Elastic Cyclic Loading
Author(s) Jose Javier Solano, Sven E. Gustafson, Brandon T Mackey, Krzysztof Stopka, Hemant Sharma, Jun-Sang Park, Peter Kenesei, Michael D Sangid
On-Site Speaker (Planned) Jose Javier Solano
Abstract Scope High-energy X-ray diffraction microscopy (HEDM) is used to non-destructively characterize individual grains within a polycrystal. In the far field modality, the repeatability of this technique for measuring the grain-average elastic strains during experimental cyclic loading has not been established. Instead, widely accepted values for the resolution of HEDM measurements have been established, which cannot capture all experimental detection set-up and loading variability influencing measurements. In this work, empirical variability of the in-situ HEDM grain-average metrics is captured for 600 grains of a nickel superalloy across 1000 cycles. Crystal plasticity modeling is used to confirm the individual grains do not experience plastic deformation. The fluctuation of the grain-average elastic strains throughout cyclic loading defines the repeatability index of in-situ HEDM. Lastly, to further isolate the repeatability index, different combinations of the grain-average elastic strains, orientations, and centroid positions are used within the reconstruction method with others assumed constant during cyclic loading.
Proceedings Inclusion? Planned:
Keywords Other, Other, Other

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