The aim of this research was to study the ability of improving the impact resistance and
Vickers microhardness of composite material based on aluminum metal reinforced by 5, 10, and
15wt.% of chopped alumina fibers. Stirring casting method has been used to make composite material
by using vortex technique which is used to pull the chopped alumina fibers to inside the melted
aluminum and distributed them homogeneously.
Regarding the impact test, results shown that the impact resistance of the composite material
are more than that in the aluminum metal and these values are increased with increasing of the amount
add fibers and they reached maximum values at (10 wt. %). Then they are decreased at (15 wt. %) but
these values remain at higher values than that in the aluminum metal. While the Vickers
microhardness reached maximum values at (15 wt. %).