Dry Sliding Friction and Wear Studies of Fly Ash Reinforced AA-6351 Metal Matrix Composites

Table 6

Grey relational coefficient of each performance characteristic.

Ex.	Sliding wear (μ)	Specific wear rate (m^2/N) ×  10^−15	Friction coefficient
1	0.722	0.511	0.659
2	0.883	0.560	0.333
3	1.000	0.960	0.681
4	0.481	0.560	0.802
5	0.435	0.653	0.757
6	0.680	1.000	1.000
7	0.366	0.599	0.466
8	0.355	0.395	0.748
9	0.333	0.333	0.730