Improving of some mechanical properties, microstructure and electrical conductivity of pure aluminum by adding Zinc

الملخص EN

In this research study the effect of addition of zinc on the mechanical properties (Hardness , yield strength , Ultimate stress) for pure aluminum and also microstructure , density , addition to the electrical conductivity , three alloys were prepared by change ratios add zinc ( 10% , 20% , 30% ).

The results showed that increased proportion of zinc added to pure aluminum caused an increase in the yield stress and improving ratio reach to 84.86% and also an increase in ultimate stress and improving ratio reach to 78.58% at ratio(30 % ) ,and an increase in the hardness reach improving ratio to 43.45% at ratio (30 %) while the decrease in electrical conductivity to the value of (0.703*106-1 .m-1 ) and increase in the density and improving ratio reach to 13.814% when the ratio of zinc added to the pure aluminum increases , a change in microstructure and regular distribution of zinc on the boundary of crystalline for alloys, has also been noticed.