Figure 1
From: Faceting–roughening transition of a Cu grain boundary under electron-beam irradiation at 300 keV

(a) Three-dimensional sketch showing crystallographic directions of the Cu bicrystal composed of two grains with a misorientation relationship of [0 0 1]/45°. (b) Illustration of crystallographic directions of an FIB specimen extracted from the GB area in the bicrystal.