Weldability Investigation and Optimization of Process Variables for TIG-Welded Aluminium Alloy (AA 8006)

Table 10

Analysis of variance for the regression model (S/N ratio-tensile strength).

Source	DF	Seq SS	Contribution (%)	Adj SS	Adj MS	F-value	value
Regression	3	2298.22	99.93	2298.22	766.07	2240.8	≤0.001
Peak current (Amps)	1	4.39	0.19	4.39	4.39	12.83	0.016
Base current (Amps)	1	1418.04	61.66	1418.04	1418.04	4147.9	≤0.001
Welding speed (mm/min)	1	875.80	38.08	875.80	875.80	2561.8	≤0.001
Error	5	1.71	0.07	1.71	0.34
Total	8	2299.93	100.00