Fig. 12

Entrance morphology and cross section of the workpiece after processing (a) 0.05 mm, (b) 0.1 mm, (c) 0.15 mm, (d) 0.2 mm.
Entrance morphology and cross section of the workpiece after processing (a) 0.05 mm, (b) 0.1 mm, (c) 0.15 mm, (d) 0.2 mm.