Demonstrating the potential of accurate absolute cross-grain stress and orientation correlation using electron backscatter diffraction

We report a first exploration of High-angular-Resolution Electron Backscatter Diffraction, without using simulated Electron Backscatter Diffraction patterns as a reference, for absolute stress and orientation measurements in polycrystalline materials. By co-correlating the pattern center and fully exploiting crystal symmetry and plane-stress, simultaneous correlation of all overlapping regions of interest in multiple direct-electron-detector, energy-filtered Electron Backscatter Diffraction patterns is achieved. The potential for highly accurate measurement of absolute stress, crystal orientation and pattern center is demonstrated on a virtual polycrystalline case-study, showing errors respectively below 20 MPa (or 10(-4) in strain), 7 x 10(-5) rad and 0.06 pixels. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.