Effect of Pin Geometry and Orientation on Friction and Wear Behavior of Nickel-Coated EN8 Steel Pin and Al6061 Alloy Disc Pair

Table 4

Average coefficient of friction for different load conditions.

Load, kg	Coating samples: coefficient of friction, μ			Uncoated samples: coefficient of friction, μ
	Pin configured at 90°	Pin configured at 45°	Pin configured at 0°	Pin configured at 90°	Pin configured at 45°	Pin configured at 0°
0.5	0.37 ± 0.025	0.33 ± 0.022	0.37 ± 0.028	0.61 ± 0.022	0.60 ± 0.012	0.62 ± 0.021
3.0	0.49 ± 0.045	0.51 ± 0.035	0.52 ± 0.031	0.68 ± 0.032	0.71 ± 0.025	0.71 ± 0.034
5.0	0.52 ± 0.052	0.50 ± 0.037	0.52 ± 0.028	0.71 ± 0.023	0.70 ± 0.017	0.72 ± 0.025