Optimization on Tribological Characteristics of Stir-Casted AA7076/Nano Zirconium Dioxide/Boron Nitride Hybrid Composites by Taguchi Method

Table 7

VHN summary.

Experiment number	Percentage of reinforcement	Agitation speed	Agitation time	Temperature at molten state	Vickers hardness number
	(%)	(rev/min)	(min)	(°C)	(VHN)
1	0	450	15	700	112
2	0	500	20	750	91
3	0	550	25	800	116
4	0	600	30	850	114
5	4	450	15	800	118
6	4	500	20	850	112
7	4	550	25	700	119
8	4	600	30	750	121
9	8	450	15	850	124
10	8	500	20	800	125
11	8	550	25	750	121
12	8	600	30	700	118
13	12	450	15	750	125
14	12	500	20	700	120
15	12	550	25	800	126
16	12	600	30	850	119