Elevated Temperatures Tensile Characteristics of Cast A356/Al<sub>2</sub>O<sub>3</sub> Nanocomposites Fabricated Using a Combination of Rheocasting and Squeeze Casting Techniques — Oak Academic Publishing
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Elevated Temperatures Tensile Characteristics of Cast A356/Al<sub>2</sub>O<sub>3</sub> Nanocomposites Fabricated Using a Combination of Rheocasting and Squeeze Casting Techniques
In the present investigation, the tensile properties of A356/Al<sub>2</sub>O<sub>3</sub> nanocomposites at both ambient and elevated temperatures were studied. The A356/Al<sub>2</sub>O<sub>3</sub> nanocomposites were fabricated using a combination between the rheocasting and squeeze casting techniques. The A356 matrix alloy was reinforced with Al<sub>2</sub>O<sub>3</sub> nanoparticulates having average sizes of 60 nm and 200 nm with different volume fractions up to 5 vol%. The results revealed that the A356/Al<sub>2</sub>O<sub>3</sub> nanocomposites exhibited better mechanical properties than the A356 monolithic alloy. Such improvement in the mechanical properties was observed at both room and elevated temperatures up to 300°C. Increasing the volume fraction and/or reducing the size of Al<sub>2</sub>O<sub>3</sub> nanoparticulates increase both the tensile and yield strengths of the nanocomposites.
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