Adaptive domain misorientation approach for the EBSD measurement of deformation induced dislocation sub-structures

Adaptive domain misorientation approach for the EBSD measurement of deformation induced dislocation sub-structures - Matlab implementation. (Released under GPL v3+ license)

The adaptive domain misorientation approach can resolve sub-grains and dislocation cell using conventional EBSD. The measurement principle utilises measurement domains that are grown radially until a specified misorientation value has been reached. This enables stochastic analysis of local misorientation to be carried out within individual sub-grains and dislocation cells.

The sub-structural boundaries are classified according to the total misorientation across the boundary region, the thickness of which can vary from approximately one hundred nanometres to several hundred nanometres. Sub-grain boundaries with a total misorientation larger than 2° are resolved effectively for as-measured Hough-based EBSD data. De-noising of the EBSD data allows small dislocation cells to be resolved, typically having a misorientation of 0.4° – 1.0°. The developed approach is found suitable to various deformed metals, showing a significant increase in the level of detail resolved compared to the conventional kernel misorientation approach.

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