Optimization and Mechanical Characteristics of AA6061/Zirconia Nanocomposites Fabricated by Ultrasonic-Aided Stir Casting Method

Table 8

Results of confirmation trials.

Factor setting	Initial factor	Optimum factors from Taguchi Grey response surface methodology
		Trial values	Enhancement in response value
Level	A3B3C1D2E4	Ultrasonic therapy  kW Ultrasonic therapy  min Pouring temperature =700.73°C Squeezing  MPa Weight % of
Grey relational grade	0.6199	0.8208	0.203
Hardness (VHN)	144.75	152	7.250
Ultimate tensile strength (MPa)	298.73	339.58	40.850
% of elongation (%)	6.98	10.6	3.620
Grain size (μm)	128.56	43	85.560