Tribological Behavior on Stir-Casted Metal Matrix Composites of Al8011 and Nano Boron Carbide Particles

Table 4

Gray coefficient and rank position of wear rates and friction coefficient.

Wear samples order	Wear rate (mm^3/min)	Friction coefficient	Coefficient (WR)	Coefficient (FC)	Mixed GRG	GRG rank
1	2.451	0.159	1.000	1.000	1.000	1
2	3.684	0.651	0.443	0.389	0.416	6
3	2.985	0.416	0.648	0.550	0.599	3
4	2.485	0.162	0.967	0.991	0.979	2
5	3.124	0.528	0.593	0.459	0.526	5
6	3.951	0.591	0.396	0.421	0.408	7
7	3.012	0.492	0.636	0.485	0.561	4
8	4.005	0.752	0.387	0.346	0.367	8
9	4.415	0.786	0.333	0.333	0.333	9

GRG, gray relational grade.