5. Conclusion

' ' A solution for viscosity of alloys has been derived based on an extension of s surface tension-viscosity relation equation for pure metals [34] and Kaptay s s Egry' [10] unified solution for viscosity of multicomponent alloys. Kaptay and Egry surface tension-viscosity relations were plotted against temperature. It was shown that for the pure metals analyzed in the present study, for lower temperatures, both relations deviated from each other. However, for higher temperatures, a better agreement has been achieved. The derived solution for surface tension was plotted against temperature for ternary Al-Cu-Si and Al-Cu-Si-Mg alloys. It was shown that with increasing Si alloy content, the surface tension of Al-based alloys decreases, which is in agreement with the casting practice of Aluminum-based alloys.
