Figure 1: The orientations and primary slip systems of the specimens.
From: Controllable fatigue cracking mechanisms of copper bicrystals with a coherent twin boundary

(a) Orientation and grain boundary (GB) map with the cutting ways of the specimens. (b) {111} pole figure of the bicrystal; primary slip systems predicted by Schmid’s law for the bicrystals with a twin boundary (TB) (c) parallel (d) inclined at 45° and (e) perpendicular to the loading direction, respectively. (f) The double Thompson tetrahedron.