Region 2 in Fig. 7b at a higher magnification is shown in Fig. 8a, locating at the scale/substrate interface. A columnar grain in the figure consists of three characteristic regions as marked by 2-1 to 2–3, selected area diffraction (SAD) patterns of which are given in Fig. 8b.

Region 2 in Fig. 7b at a higher magnification is shown in Fig. 8a, locating at the scale/substrate interface. A columnar grain in the figure consists of three characteristic regions as marked by 2-1 to 2–3, selected area diffraction (SAD) patterns of which are given in Fig. 8b.