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. 2016 Dec 19;7:13826. doi: 10.1038/ncomms13826

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Copyright © 2016, The Author(s)

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EBSD-based distribution of grain boundaries and twin crossing at grain boundaries with grain boundary misorientation angle for (a) Mg and (b) Zr. White bars: all grain boundaries; blue bars: twin-crossed boundaries. The secondary vertical axis shows the fraction of grain boundaries that have been crossed by twins. Non-zero crossed boundary fraction beyond 60° for Zr can be a consequence of local stress deviations associated with clusters of small-sized grains where twin variants with negative ‘macroscopic' Schmid factor are activated.