261349.fig.0013
Figure 13: Optical micrograph of tool flank wear for treatment at (a) 24 m/min and 0.15 mm/rev, (b) 36 m/min and 0.15 mm/rev, (c) 30 m/min and 0.25 mm/rev, (d) 36 m/min and 0.25 mm/rev, (e) 30 m/min and 0.15 mm/rev, and (f) 24 m/min and 0.25 mm/rev.