Identification of sub-grains and low angle boundaries beyond the angular resolution of EBSD maps

A new method called ALGrId (Anti-Leak GRain IDentification) is proposed for the detection of sub-grains beyond the relative angular resolution of Electron Backscatter Diffraction maps. It does not use any additional information such as Kikuchi Pattern Quality map nor need data filtering. It uses a modified Dijkstra algorithm which seeks the continuous set of boundaries having the highest average disorientation angle. [Display omitted] •ALGrId is a new method to identify sub-grains and low angle boundaries in EBSD maps.•Unlike classical methods, ALGrId works even beyond the relative angular resolution.•If the orientation noise peaks at 0.7°, ALGrid detects 0.4°-boundaries correctly.•In the same example, the classical algorithm identifies 1.1°-boundaries only.