الفهرس 
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Abstract
Nowadays the fast improvement in technology leads to an increase in the
requirement of Nano-composite material in manufacturing industries. Nanocomposite material occupies a wide domain in numerous industrial applications. Nano-composites can extremely enhance mechanical, electrical and chemical
properties. For mechanical properties their hardness, mechanical strength and wear corrosion resistance were increased relative to low density. The use of the nonconventional cutting process in the machining of aluminium metal matrix composites (Al-MMC) has aroused considerable interest as it is difficult for the manufacturing a complex contours in these very hard materials at a high level of precision and surface finish. Among the many non-traditional processing strategies, electrical discharge machining has proved itself to be one of the effective machining processes in numerous industries. In the current investigation, the impact of EDM process parameters, namely
current (I), duty factor (Dt) and time of spark duration (Ton) on the predominant machining evaluation criteria such as material removal rate (MRR), gap sides (2GS), tool wear ratio (TWR) and surface roughness (Ra) were studied. Stir casting process was performed to prepare aluminium metal matrix Nano-composite reinforced by Nano - alumina Al2O3 of average size 30 nm. The matrix Al (6063) Al- 1.5%Al2O3, Al- 1%Al2O3 and Al- 0.5%Al2O3 are chosen as work-piece material. Graphite, copper and brass were used as electrode materials. L16 (44
)orthogonal array based the Taguchi approach was used to design the machining experiments. Analysis of variance ANOVA and S/N Signal-to-noise ratio are applied to study the impact of process parameters on the (Ra), MRR), (TWR) and (2GS). It can be confirmed that the current has a significant impact on the (SR), (MRR), (TWR) and (2GS) for graphite, copper and brass electrodes.