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

Table 7

Summary of experimental output values.

S. no.	Peak current (Amps)	Base current (Amps)	Welding speed (mm/min)	Tensile strength (MPa)	Impact strength (J)	Hardness (HRB)	SN ratio of tensile strength	SN ratio of impact strength	SN ratio of hardness (HRB)
1	170	55	140	109.42	26	42	40.781	28.299	32.465
2	170	60	150	81.57	28	35	38.230	28.943	31.126
3	170	65	160	54.83	36	28	34.780	31.126	28.943
4	180	55	140	97.51	16	48	39.781	24.082	33.624
5	180	60	150	70.82	23	44	37.003	27.234	32.869
6	180	65	160	79.18	41	26	37.972	32.255	28.299
7	190	55	140	86.91	12	52	38.781	21.583	34.320
8	190	60	150	96.45	24	38	39.686	27.604	31.595
9	190	65	160	67.59	30	36	36.597	29.542	31.126