Advances in Materials Science and Engineering / 2013 / Article / Tab 5

Research Article

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

Table 5

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

SourceSSDOFMS -Value At 95% CI% Contribution

Pulse on time1.6411.64775.10<0.0001Significant55.0
Pulse off time0.8410.84396.22<0.0001Significant28.0
Peak current0.2310.23108.54<0.0001Significant8.0
Spark gap voltage0.1810.1885.03<0.0001Significant6.0
Pulse off time 20.01310.0136.360.0155Significant 0.41
Wire feed20.06810.06832.18<0.0001Significant 2.15
Wire tension20.01910.0198.900.0047Significant 0.6
Pulse on time peak current0.08610.08640.62<0.0001Significant 2.71
Lack of fit0.087380.0022952.910.1173Not significant
adjusted = 0.9646

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

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