Issue 65

K. Ganesh et alii, Frattura ed Integrità Strutturale, 65 (2023) 32-46; DOI: 10.3221/IGF-ESIS.65.03

changed alloy. It can be concludes that the plotted lines are highly intersecting (crossing) between each other.

Figure 5: Interaction plots for wear loss.

Figure 6: Interaction plots for COF. The model adequacy was also evaluated by analysis of residuals. Generally, it is helps to study the model fit. When the model fits the data very well, there are fewer residuals and non-normality structures seen on the normal probability plots. The time evolution in residuals was observed using the residual v/s. order graphs. The results of residuals and abscissa on ordinate were used to plot the residual v/s. fits plots. The residual histogram plots generally aid in determining if the obtained data are skewed. Figs. 7 and 8 show the wear rate and COF residual plots for the improved composites.

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