Optimization of Plasma Arc Cutting Parameters on Machining of Inconel 718 Superalloy

Table 4

Analysis of variance for KT.

Term	Coef	SE Coef	-value	value	VIF
Constant	8.843
Arc current (Amps)
80	-1.173				1.33
90	1.046				1.33
Cutting speed (mm/min)
500	-0.3862				1.33
750	0.09311				1.33
Gas pressure (Bar)
50	0.1684				1.33
55	-0.4742				1.33
Stand-off distance (mm)
2	-0.4259				1.33
3	0.6334				1.33