Optimization and Characterization Studies of Dissimilar Friction Stir Welding Parameters of Brass and Aluminum Alloy 6063 Using Taguchi

Table 4

Mean values and main effects of hardness (SNR).

Levels	Ntool (rpm)	Tpreheat (°C)	Straverse (mm/min)	Ppin
1	37.14	37.06	37.13	37.15
2	37.12	37.14	37.04	37.09
3	37.01	37.07	37.09	37.02
Delta	0.13	0.08	0.09	0.13
Rank	1	4	3	2

The bold values shows the highest values.