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

Table 9

Response table for S/N ratio (tensile strength) (larger is better).

Level	Peak current (Amps)	Base current (Amps)	Welding speed (mm/min)
1	37.93	39.78	39.48
2	38.25	38.31	38.20
3	38.36	36.45	36.85
Delta	0.42	3.33	2.63
Rank	3	1	2