The intensity of the adhesive marks at the chip undersides can be used as an indication of theseverity of the adhesive wear mechanism [36]. However, selected chip underside micrographs werepresented in Figure 10. At 250 m/min, the intensity of the adhesive marks on the chip undersideproduced by CC620 was less than the intensity of these marks on the chip underside produced byCC650. At 700 m/min, CC650 produced less intense adhesive marks than CC620. The results deducedfrom Figure 10 are in agreement with the results obtained from the chip compression ratio curvespresented in Figure 9 and the wear curves in Figures 3 and 5.