Advances in Materials Science and Engineering / 2013 / Article / Tab 4

Research Article

Experimental Investigation on Material Transfer Mechanism in WEDM of Pure Titanium (Grade-2)

Table 4

The analysis of variance for main and interaction effects of parameters on overcut.

SourceSSDOFMS -valueProb. > At 95% CI% Contribution

Model1101.811291.8230.71<0.0001significant
Pulse on time368.171368.17123.16<0.0001significant30.07
Pulse off time352.671352.17117.97<0.0001significant28.76
Peak current176.041176.0458.89<0.0001significant14.37
Spark gap voltage28.17128.179.42<0.0038significant2.30
Pulse off time 214.22114.224.760.0350significant1.16
Peak current 276.13176.1325.47<0.0001 significant6.21
Wire feed213.40113.404.480.0403significant1.09
Wire tension254.41154.4118.20<0.0001significant4.44
Pulse on time spark gap voltage36.00136.0012.040.0012significant2.94
Pulse off time peak current21.13121.137.070.0111significant1.72
Lack of fit115.73363.210.1719not significant
adjusted = 0.8706
Predicted

SS: sum of square, DOF: degree of freedom, MS: mean square, -value: Fisher value.

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