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

Table 5

Analysis of variance for HAZ.

Source	DF	Adj SS	Adj MS	-value	value
Regression	4.1	1.31370	0.35342	4.58	0.085
Arc current (Amps)	1	1.25584	1.25584	16.27	0.016
Cutting speed (millimeter/minute)	1	0.14570	0.14570	1.89	0.241
Gas pressure (Bar)	1	0.01215	0.01215	0.16	0.712
Stand-off distance (millimeter)	1	0.00000	0.00000	0.00	0.994
Error	4.1	0.30879	0.07720
Total	8.1	1.72249