Abstract
In the present study, elemental and 0.3 μm size Al 2O 3 particulates-reinforced magnesium materials were synthesized using disintegrated melt deposition technique followed by hot extrusion. Microstructural characterization of the composite samples showed fairly uniform reinforcement distribution with good reinforcement–matrix interfacial integrity, significant grain refinement and the presence of minimal porosity. Tensile properties characterization revealed that the presence of submicron-Al 2O 3 reinforcement led to significant improvement in 0.2%YS, and UTS. However, ductility and work of fracture of the composites remain higher with the addition of submicron-Al 2O 3 particulates up to 1.1 vol%. The results further revealed that the combination of 0.2% yield strength and UTS exhibited by 0.3 μm size Al 2O 3 reinforced magnesium remained much superior even when compared to magnesium reinforced with nano-size Al 2O 3 and micron size SiC. An attempt is made in the present study to correlate the effect of submicron-Al 2O 3 as reinforcement and its increasing amount with the microstructural and tensile properties of magnesium.
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