[Retracted] Synthesis, Mechanical, and Tribological Performance Analysis of Stir-Casted AA7079: ZrO₂ + Si₃N₄ Hybrid Composites by Taguchi Route

Table 7

Experimental summary of Vickers hardness test.

Exp. runs	% of reinforcement	Agitation speed (rpm)	Agitation time (min)	Molten temperature (°C)	Vickers hardness (VHN)
1	0	450	15	700	107
2	0	500	20	750	99
3	0	550	25	800	112
4	0	600	30	850	110
5	4	450	20	800	114
6	4	500	15	850	108
7	4	550	30	700	115
8	4	600	25	750	118
9	8	450	25	850	120
10	8	500	30	800	121
11	8	550	15	750	117
12	8	600	20	700	113
13	12	450	30	750	122
14	12	500	25	700	116
15	12	550	20	850	121
16	12	600	15	800	115