Abstract
In this research, aluminum alloy 2024 was enhanced with varying mass percentages (0 wt. %, 2.5 wt. %, 5 wt. %, and 7.5 wt. %) of titanium dioxide nanoparticles through the stir casting technique. Subsequently, the material underwent a solution annealing process at 500 °C for a duration of 3 hours, followed by rapid cooling in water and aging at 175 °C for another 3 hours. The primary aim of this investigation was to examine the impact of incorporating TiO2 nanoparticles on both the microstructure and the mechanical properties of the 2024 aluminum alloy composite produced through the stir casting method. Scanning electron microscopy, energy-dispersive analysis, as well as X-ray diffraction analysis were implemented to characterize the microstructure, elemental and phase composition of the samples. The tensile and Vickers hardness tests were carried out to evaluate the mechanical properties. The results showed that the addition of 7.5 wt.% TiO2 nanoparticles increases the ultimate tensile strength by 37 % and elongation by 71 % while decreases the hardness by 14 % comparing with the initial alloy. The highest hardness was demonstrated in the alloy with 5 wt. % TiO2.
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