Abstract
In the present study, AZ41 alloy and AZ41-1.5Al2O3 nanocomposite were developed by adding 1 wt. % Al and 1 wt.% Al with 1.5 vol.% nano-sized A12O3 (50 nm) particulates in to AZ31 magnesium alloy, respectively, using disintegrated melt deposition technique. All samples were then subsequently hot extruded at 400 °C and characterized. Microstructural characterization studies revealed equiaxed grain morphology, minimal porosity, reasonably uniform distribution of A12O3 nanoparticulates and good matrix-reinforcement interfacial integrity. Microhardness was increased with the addition of A12O3 nanoparticulates in to AZ41 alloy. Room temperature tensile test results revealed that the AZ41-A12O3 nanocomposite exhibited improved ultimate tensile strength (UTS), ductility and toughness when compared to monolithic AZ41 alloy but 0.2% yield strength was compromised. However, room temperature compressive test results of AZ41-Al2O3 nanocomposite revealed significant improvement on overall compressive properties over AZ41 alloy.
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