Visualization of grain subdivision by analysing the misorientations within a grain using electron backscatter diffraction

Authors: VAN BOXEL, S.; SEEFELDT, M.; VERLINDEN, B.; VAN HOUTTE, P.

Source: Journal of Microscopy, Volume 218, Number 2, May 2005 , pp. 104-114(11)

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Abstract:

Summary

The misorientation relative to the average orientation of a grain and the point-to-point relative misorientation along a line across a moderately cold deformed grain, calculated from an electron backscatter diffraction (EBSD) dataset, are analysed in detail by visualizing both the misorientation angle and the misorientation axis. The significance of monitoring the misorientation axis is illustrated by an example of a grain subdivided into a misorientation band structure. A new technique to visualize the subdivision structure by assigning colours to misorientations in such a way that the contrast is maximized within a grain is introduced and discussed. Furthermore, some methods for grain boundary reconstruction from EBSD datasets are compared with the map of the confidence index in order to provide a validation of the accuracy of these methods.

Keywords: EBSD; fragmentation; grain subdivision; misorientations

Document Type: Research article

DOI: http://dx.doi.org/10.1111/j.1365-2818.2005.01467.x

Affiliations: 1: Department of Metallurgy and Materials Engineering (MTM), Katholieke Universiteit Leuven, Kasteelpark Arenberg 44, B-3001 Heverlee, Belgium

Publication date: 2005-05-01