|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Accurate Determination of EBSD Pattern Centers with Applications in Resolving Pseudosymmetry
||Edward L. Pang, Peter M Larsen, Christopher A Schuh
|On-Site Speaker (Planned)
||Edward L. Pang
Accurate pattern center determination has long been a challenging problem in EBSD. With the rise of advanced EBSD techniques, accurate fitting of pattern centers is even more important as it limits the accuracy of these methods. However, quantitative aspects of this fitting landscape are still unknown. In this talk, we explore optimizing the pattern center and orientation by comparison to dynamically simulated reference patterns. This analysis reveals that the landscape is both “sloppy” and noisy, which limits the accuracy to which pattern centers can be determined. Based on this landscape, we have developed a fitting procedure that demonstrates good accuracy, precision, and robustness to noise and binning. We then apply this method to tetragonal zirconia and demonstrate its utility in resolving pseudosymmetry using dictionary indexing.