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Automated Prediction of Pseudo-Symmetry Issues in EBSD

Pseudo-symmetry (PS) issues arise in the analysis of electron back-scatter diffraction (EBSD) patterns when similarities between patterns for different crystal orientations cause the indexing algorithm to select the incorrect orientation. In inverse pole figure (IPF) maps, the result often appears as grains with a random distribution of two colors instead of a single color. While PS issues are readily recog-nizable in IPF maps, and can be corrected manually by post-processing of the map, the prediction of the occurrence of pseudo-symmetry is not as straightforward. In this contribution, we present a new algorithm capable of predicting for which crystal orientations PS issues may occur.