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On the Accuracy of Elastic Strain Field Measurements by Laue Microdiffraction and High-Resolution EBSD: a Cross-Validation Experiment

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Abstract

Determining the accuracy of elastic strain measurements in plastically deformed alloys is an experimental challenge. To develop a novel cross-validation procedure, a controlled elasto-plastic strain gradient was created in a stainless steel single crystal by four point bending deformation. The corresponding elastic strain field was probed, with an intragranular spatial resolution, in-situ by Laue microdiffraction and ex-situ by High Resolution EBSD. Good agreement is found for the two independent measurements and the predictions of a mechanical model, at plastic strains below 0.5 %. The accuracy of the measurements is estimated at 3.2 × 10− 4.

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Acknowledgments

This work has been financially supported by the French Research Agency ANR as part of the project MICROSTRESS (#ANR-11-BS09-030). The synchrotron data used in this work was collected during ESRF experiment 32-02-748. We thank O. Geaymond for his help with setting up the Laue microdiffraction instrument. We gratefully acknowledge J. Stodolna, E. Bosso and J.-H. Driver for their advice.

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Plancher, E., Petit, J., Maurice, C. et al. On the Accuracy of Elastic Strain Field Measurements by Laue Microdiffraction and High-Resolution EBSD: a Cross-Validation Experiment. Exp Mech 56, 483–492 (2016). https://doi.org/10.1007/s11340-015-0114-1

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  • DOI: https://doi.org/10.1007/s11340-015-0114-1

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