EBSD orientation analysis based on experimental Kikuchi reference patterns

Winkelmann, Aimo and Cios, Grzegorz and Tokarski, Tomasz and Nolze, Gert and Hielscher, Ralf and Kozieł, Tomasz (2020) EBSD orientation analysis based on experimental Kikuchi reference patterns. Acta Materialia, 188. pp. 376-385. ISSN 1359-6454 (https://doi.org/10.1016/j.actamat.2020.01.053)

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Orientation determination does not necessarily require complete knowledge of the local atomic arrangement in a crystalline phase. We present a method for microstructural phase discrimination and orientation analysis of phases for which there is only limited crystallographic information available. In this method, experimental Kikuchi diffraction patterns are utilized to generate a self-consistent master reference for use in the technique of Electron Backscatter Diffraction (EBSD). The experimentally derived master data serves as an application-specific reference in EBSD pattern matching approaches. As application examples, we map the locally varying orientations in samples of icosahedral quasicrystals observed in a Ti40Zr40Ni20 alloy, and we analyse AlNiCo decagonal quasicrystals.