The influence of each parameter can be seen in the form of slope of main effects plot. The optimum or best values can be easily read from those plots. How much each parameter can influence the outcome of coefficient of friction is interpreted using main effects plot. In the present study the friction and wear behaviors of 356 aluminium alloy reinforced with graphite and granite dust particles were analyzed by taguchi and ANOVA techniques at different field conditions. The wear, frictional performance is not in homogeneous pattern for all composites with reference to change in wear parameters. From different studies it is revealed that various field/process/wear parameters influencing wear, coefficient of friction of AMC's. The friction coefficient of graphite particulates reinforced in pure aluminium up to 5 wt.% decreases with increase in sliding velocity and sliding distances is reported by Rajesh et al. studied the wear behavior of A7075/graphite/Al 2O 3 hybrid composites and reported that the friction coefficient of 7075 alloy decreases with 5 percent addition of graphite and up to 8 percent addition of Al 2O 3. Taguchi approach and analysis of variance techniques were used by many authors to find the most affecting parameters on wear and friction. The friction and wear performance of various hybrid metal matrix composites and the important parameters which influence the wear and friction like applied load, sliding distance and reinforcement percentage were reported by many authors. The enhanced properties lead to aluminium metal matrix composites to play a vital role in various applications like cylinder liners, barrels automobile components like piston, connecting rods, brakes and other power transmission elements. Most of the ceramic reinforcements are chemically in tune with the aluminium metal and forms perfect bonding so that the properties like thermal conductivity, workability specific strength, stiffness, wear resistance, fatigue and corrosion will be improved. matrix and the reinforcement for example, SiC, B 4C, TiC, Al 2O 3 are hard reinforcements to fabricate composite materials. The aluminium metal matrix composites are advanced materials which consists of two phases i.e.
The main fundamental demand from the automobile industry is to find advanced materials, which are capable of reducing fuel utilization and vehicle discharges. Due to the improved mechanical and tribological properties, aluminium metal matrix composites (AMMC's) got great importance and became a part of aviation and automobile/vehicle industries.
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