Synthesis and Characterization of Mechanical Properties of AA8014 + Si₃N₄/ ZrO₂ Hybrid Composites by Stir Casting Process

Table 3

Experimental summary of wear and microhardness tests.

Exp. No.	% of reinforcement	Stir speed (rpm)	Stir time (min)	Molten temperature (^oC)	Wear (mm^3/m)	Microhardness (VHN)	S/N ratio of wear	S/N ratio of microhardness
1	4	400	20	700	0.256	118	11.2687	41.4582
2	4	400	20	700	0.382	116	11.2687	41.4582
3	4	400	20	700	0.112	121	11.2687	41.4582
4	4	500	25	800	0.654	115	6.9550	41.0758
5	4	500	25	800	0.256	99	6.9550	41.0758
6	4	500	25	800	0.334	133	6.9550	41.0758
7	4	600	30	900	0.095	148	13.1822	42.6045
8	4	600	30	900	0.127	120	13.1822	42.6045
9	4	600	30	900	0.345	142	13.1822	42.6045
10	6	400	25	900	0.115	166	11.8289	42.5405
11	6	400	25	900	0.412	133	11.8289	42.5405
12	6	400	25	900	0.118	116	11.8289	42.5405
13	6	500	30	700	0.234	152	12.0737	41.3380
14	6	500	30	700	0.345	98	12.0737	41.3380
15	6	500	30	700	0.111	117	12.0737	41.3380
16	6	600	20	800	0.410	137	8.4767	41.8277
17	6	600	20	800	0.318	117	8.4767	41.8277
18	6	600	20	800	0.396	119	8.4767	41.8277
19	8	400	30	800	0.124	121	14.6033	43.0553
20	8	400	30	800	0.098	160	14.6033	43.0553
21	8	400	30	800	0.281	156	14.6033	43.0553
22	8	500	20	900	0.108	134	13.1902	41.8388
23	8	500	20	900	0.345	128	13.1902	41.8388
24	8	500	20	900	0.115	112	13.1902	41.8388
25	8	600	25	700	0.312	135	12.1783	40.8975
26	8	600	25	700	0.099	95	12.1783	40.8975
27	8	600	25	700	0.273	113	12.1783	40.8975