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Abstract
ABSTRACT In this study, an innovative bimodal hybrid composite of AA6082 reinforced with nano-TiO2 and -SiC particles is fabricated by stir-squeeze casting technique. To enhance microstructural and mechanical properties, the developed composite is processed with heat treatment. Advanced characterization techniques like XRD, HRTEM, and FESEM equipped with energy-dispersive electroscope are utilized to access microstructural behaviour. Microstructure examination shows that grains are refined after heat treatment compared to as-cast alloy. Mechanical testing is used to examine the hardness, strength, and toughness of as-cast as well as heat-treated alloy and composite. The heat-treated composite reinforced with 0.5 wt% of TiO2 and 3 wt% of SiC shows a maximum value of hardness, yield strength, and ultimate tensile strength of 124.55 ± 3.6 hRB, 301.1 MPa, and 378.2 ± 3.1 MPa, respectively, while elongation and toughness reduced to 5.2% and 5.1 J, respectively, for sample HS5.
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