Electrical Discharge Machining of Al (6351)-5% SiC-10% B₄C Hybrid Composite: A Grey Relational Approach

Table 3

Experimental results.

Exp. number	Pulse current (A)	Pulse on time (𝜇s)	Pulse duty factor	Gap voltage (V)	Electrode wear ratio (%)	Surface roughness (𝜇m)	Power consumed (kW)
1	5	50	4	40	0.24	5.49	2.66
2	5	50	6	45	0.25	4.54	2.13
3	5	50	8	50	0.29	6.48	2.30
4	5	75	4	45	0.46	5.83	2.70
5	5	75	6	50	0.51	5.88	2.80
6	5	75	8	40	0.40	6.19	2.18
7	5	100	4	50	0.24	5.34	2.56
8	5	100	6	40	0.14	6.38	2.55
9	5	100	8	45	0.19	6.61	1.72
10	10	50	4	40	2.58	8.21	1.66
11	10	50	6	45	2.45	7.79	2.12
12	10	50	8	50	2.21	6.91	2.14
13	10	75	4	45	1.89	7.93	1.98
14	10	75	6	50	1.71	9.11	2.04
15	10	75	8	40	1.74	7.83	2.01
16	10	100	4	50	1.13	7.69	1.85
17	10	100	6	40	0.88	9.52	1.87
18	10	100	8	45	0.95	8.31	1.63
19	15	50	4	40	3.18	8.48	1.75
20	15	50	6	45	3.00	8.56	1.64
21	15	50	8	50	2.63	8.81	1.35
22	15	75	4	45	2.50	10.03	1.47
23	15	75	6	50	2.17	9.27	1.49
24	15	75	8	40	2.21	9.74	1.40
25	15	100	4	50	1.94	8.95	1.36
26	15	100	6	40	1.85	12.82	1.12
27	15	100	8	45	1.82	13.33	0.85