## 3 Results and Discussion  
The work was conducted based on Al6061 with different compositions of SiC. The input parameters considered were current (A), pulse-on time (T\({}_{\text{on}}\)) and pulse-off time (T\({}_{\text{off}}\)). The developed ANOVA considered ONE degree of freedom for all the terms. The ANOVA table and the mathematical formulation were prepared. Tables 2 and 3 provide the summary of the ANOVA for the materials considered for the work. The first four material data were taken from the already published manuscripts [1, 2, 15, 16] and the last three materials were developed and experimented to obtain a satisfactory regression equation to enable the extrapolation. Figure 5: Methodology adopted. The first set of material taken was Al6061-15% SiC based on the work by [PERSON] and [PERSON] [2]. The work included 18 experiments, out of which 9 experimental values were adopted, ignoring the 9 values tabulated with a different polarity of electrode and workpiece. The input values considered for the experiment were: A (4, 8 and 12 A), T\({}_{\text{on}}\) (200, 400 and 600 \(\upmu\)s) and T\({}_{\text{off}}\) (20, 40 and 60 \(\upmu\)s). The equations obtained are provided as Equations (1) and (2). The second material considered was Al6061-20% Al\({}_{2}\)O\({}_{3}\). The input for this work was taken from [PERSON] [16]. A total of 18 experiments in his work were used for this ANOVA. The values of A were 10, 15 and 20 A; the values of T\({}_{\text{on}}\) were 50, 100 and 200 \(\upmu\)s; and the values of Toff were calculated based on the duty cycles of 0.4, 0.5 and 0.7. The equations obtained are provided as Equations (3) and (4). The third material considered for the work was Al6061-5% Al\({}_{2}\)O\({}_{3}\)-3% SiC-2% E-glass [1]. The ANOVA was generated with 15 experimental values provided by the author. The experiment was carried out for three values of A (5, 10 and 15 A), T\({}_{\text{on}}\) (30, 40 and 50 \(\upmu\)s) and T\({}_{\text{off}}\) (7, 8 and 9 \(\upmu\)s). The equations for MRR and surface roughness is provided in Equations (5) and (6).The fourth material considered was Al6061-7.5% SiC. The values were taken from the work of [PERSON] et al. [15]. \begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Sl. No.**} & \multirow{2}{*}{**Material**} & \multicolumn{8}{c}{**Contribution**} \\ \cline{2-11}  & & **Regression** & **A** & **T\({}_{\text{on}}\)** & **T\({}_{\text{eff}}\)** & **A\({}^{2}\)** & **T\({}^{2}_{\text{on}}\)** & **T\({}^{2}_{\text{off}}\)** & **A\(\times\)T\({}_{\text{on}}\)** & **A\(\times\)T\({}_{\text{off}}\)** \\ \hline
1 & Al6061-15\% SiC & 99.84\% & 30.21\% & 41.46\% & 10.36\% & 1.11\% & 10.59\% & 1.98\% & 4.13\% & 0\% \\ \hline
2 & Al6061-20\% Al\({}_{2}\)O\({}_{3}\) & 91.48\% & 73.73\% & 12.83\% & 1.42\% & 0.08\% & 0.87\% & 2.05\% & 0.01\% & 0.5\% \\ \hline
3 & Al6061-5\% Al\({}_{2}\)O\({}_{3}\)-3\% SiC-2\% E-glass & 98.38\% & 90.08\% & 5.87\% & 0.72\% & 1.67\% & 0\% & 0\% & 0.01\% & 0.01\% \\ \hline
4 & Al6061-7.5\% SiC & 96.68\% & 78.23\% & 15.43\% & 2.3\% & 0.42\% & 0.02\% & 0.19\% & 0.07\% & 0.03\% \\ \hline
5 & Al6061-3\% SiC & 100\% & 46.67\% & 38.25\% & 0.56\% & 6.54\% & 0.3\% & 7.22\% & 0.36\% & 0.1\% \\ \hline
6 & Al6061-5\% SiC & 100\% & 41.26\% & 39.79\% & 0.26\% & 3.44\% & 0.07\% & 8.29\% & 4.93\% & 1.97\% \\ \hline
7 & Al6061-9\% SiC & 100\% & 80.98\% & 9.95\% & 3.14\% & 0.00\% & 5.02\% & 0.36\% & 0.53\% & 0.01\% \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Summary of the ANOVA for MRR.