Authors : J.M. Alalkawi Hussain, Aseel A. Alhamdany and Magda Khalil Ahmed
Abstract: Preparing two aluminium matrix nanocomposites using stir casting method results in many desirable benefits. The currents research is focused on fabricating AA2024-Al2O3 and AA2024-ZrO at (2, 3 and 4 wt.%) Al2O3 and ZrO. The casting temperature and stirring speed were 850°C and 1000 rpm for 1.5 min stirring time. A microstructural study was carried out using optical microscopy and scan electric microscopy SEM, the effect of two types of reinforcements on microstructural feature was discussed. It has been observed that the reinforcement particles of the two nanomaterials Al2O3 and ZrO uniformly distributed in AA2024 matrix composites. But the Al2O3 composites had better distribution than the ZrO composites. The experimental results showed that the mechanical properties such as Brinell hardness, UTS and yield stress increases with the addition of the nanomaterial content. But the ductility for both composites reduced when the nanomaterial content increased taking almost linear trend. Also, the electrical conductivity for both composites was slightly improved with increase of nano content.
J.M. Alalkawi Hussain, Aseel A. Alhamdany and Magda Khalil Ahmed, 2019. Comparison Between Mechanical Properties, Microstructures and Electrical Conductivity of AA2024 Doped with Various Amount of Alumina and Zirconium Oxide. Journal of Engineering and Applied Sciences, 14: 7028-7035.