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

Table 4

Normalized and sound to noise ratio values of trials.

Exp. no.	Sound to noise ratio values				Normalized sound to noise ratio values
	Hardness (VHN)	Ultimate tensile strength (MPa)	Elongation (%)	Grain size (μm)	Hardness (VHN)	Ultimate tensile strength (MPa)	Elongation (%)	Grain size (μm)
1	42.869	48.409	16.056	45.892	0.188	0.042	0.53	0.946
2	42.043	48.195	15.757	44.872	0.276	0.279	0.394	0.873
3	42.008	48.828	13.976	45.378	0.256	0.472	0.209	0.832
4	42.504	48.278	10.875	46.645	0.000	0.000	0.000	1.000
5	42.368	48.455	13.803	-45.009	0.443	0.357	0.296	0.882
6	42.703	49.556	16.512	-43.110	0.613	0.690	0.564	0.746
7	42.543	49.502	16.954	43.493	0.514	0.674	0.613	0.774
8	42.077	49.043	19.088	44.455	0.293	0.535	0.818	0.843
9	42.979	49.974	17.723	42.008	0.754	0.817	0.686	0.668
10	42.311	49.513	19.478	43.168	0.413	0.677	0.855	0.751
11	43.107	49.477	16.646	42.076	0.819	0.666	0.578	0.672
12	42.768	50.028	17.056	42.279	0.645	0.833	0.623	0.687
13	43.134	50.298	17.972	39.085	0.832	0.915	0.712	0.458
14	42.892	49.127	17.265	41.139	0.709	0.560	0.642	0.605
15	42.913	50.212	20.934	36.530	0.723	0.889	1.000	0.276
16	43.465	50.578	20.548	32.679	1.000	1.000	0.97	0