<![CDATA[Aluminium alloy matrix composites attract much attention due to their lightness and moderate casting temperatures. Among the various reinforcements used in composite material, fly ash is one of the most inextensible and low density reinforcements available in large quantities as solid waste by-product obtained from combustion of coal in thermal power plants. The micro sized fly ash particles have been reduced to nano structured fly ash using High energy ball mill and the size was reduced from 53µm to 27 nm after 30 hours of milling,. Cast Al-10 wt% Mg is used as matrix to yield improved strength. Composites were fabricated with Micro and nano structured fly ash particles reinforced with Al-10Mg alloy matrix by stir casting and experiments were conducted under laboratory conditions to assess the wear characteristics of Al- 5 wt% fly ash (micro sized) and Al- 5 wt% fly ash (nano structured) composites under different working conditions in pure sliding mode on a pin-on-disc machine. The composites were given different deformations by upsetting and the effect of deformation on wear behaviour is determined in the present investigations. The wear rate of the composites was decreased with deformation and for deformations beyond 30%, the wear rate was increased due to strain softening. The increased frictional thrust at higher load results in increased debonding and caused easy removal of material and hence the wear rate is increased with increase in normal load. The coefficient of friction in all the cases is decreased with the increase of normal load. This is attributed to the wear of the matrix from the pin surface leaving the particulates standing proud.]]>
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