[Retracted] Experimental Analysis and Optimization of Tribological Properties of Self-Lubricating Aluminum Hybrid Nanocomposites Using the Taguchi Approach

Table 3

Input variables and levels for nanocomposites.

Input variables	Units	Level (I)	Level (II)	Level (III)
A: Graphite nanofillers	Wt. %	0	5	10
B: Applied load	N	10	15	20
C: Sliding distance	m	500	1500	2500
D: Sliding speed	m/s	1	1.5	2