Figure 3

(a) Load (P)-dependent microhardness (HV) graph, (b) lnP vs. lnd plots, (c) plots of P vs. d2, (d) andplots of P/d vs. d.

(a) Load (P)-dependent microhardness (HV) graph, (b) lnP vs. lnd plots, (c) plots of P vs. d2, (d) andplots of P/d vs. d.