Distributions of near-coincidence grain boundaries that occurred during equal channel angular pressing in magnesium single crystals at 503K were investigated. The coincidence boundaries with the [00•1] misorientation axis were frequent in the sample after passage of the shear plane and recrystallization. In contrast, twin boundaries dominate in the end parts of the samples. Existence of a 30° peak in the misorientation angle distribution was explained by a relatively high frequency of Σ13a boundaries and partially by the appearance of Σ15a boundaries.

Characteristics of Coincident Site Lattice Grain Boundaries Developed during Equal Channel Angular Pressing of Magnesium Single Crystals. A.Ostapovets, P.Šedá, A.Jäger, P.Lejček: Scripta Materialia, 2011, 64[5], 470-3