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

Article dans une revue avec comité de lecture
Author
PLANCHER, Emeric
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
PETIT, Johann
233900 Laboratoire Energétique Mécanique Electromagnétisme [LEME]
MAURICE, Claire
17835 Laboratoire Hubert Curien [LHC]
FAVIER, Véronique
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
SAINTOYANT, Lucie
302313 EDF [EDF]
LOISNARD, Dominique
528445 Matériaux et Mécanique des Composants [EDF R&D MMC]
RUPIN, N.
528389 EDF R&D [EDF R&D]
MARIJON, Jean-Baptiste
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
ULRICH, Olivier
40368 Nanostructures et Rayonnement Synchrotron [NRS ]
BORNERT, Michel
204904 Laboratoire Navier [navier umr 8205]
MICHA, Jean Sébastien
2568 European Synchrotron Radiation Facility [ESRF]
502643 Synthèse, Structure et Propriétés de Matériaux Fonctionnels [STEP]
ROBACH, Odile
2568 European Synchrotron Radiation Facility [ESRF]
40368 Nanostructures et Rayonnement Synchrotron [NRS ]
CASTELNAU, Olivier
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/15090
DOI
10.1007/s11340-015-0114-1
Date
2016
Journal
Experimental Mechanics

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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