Document Type : Original Article
Authors
1
Production Engineering &Mechanical Design, Faculty of Engineering, Shibin El Kom, Menoufia University, Industrial Engineer
2
Basic Engineering Science Department, Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt
3
Production Engineering and Mechanical Design Department Faculty of Engineering, Menoufia University
4
Production and Mechanical Design, Faculty of Engineering, Menoufia University
Abstract
Al-Si alloy is becoming more and more popular for applications such as pistons, liner less engine blocks, pumps, and other parts that require a combination of lightweight, malleability, formability, and excellent corrosion and wear resistance. However, the structure of hypereutectic Al-Si alloys is characterized by dendritic morphology which limits their formability and enhances their cracks susceptibility so, in an attempt to overcome this problem titanium dioxide (TiO2) with weight rates of 0.5, 1, 1.5, and 3 weight percent nanoparticles were synthesized via Sol-Gel route and added to the 16 percent Al-Si alloy to follow this effect of structural modification as a direct result of TiO2 NPs addition, mechanical (static and dynamic) tests were performed. Using scanning electron microscopy and x-ray diffraction, the microscopic structure and morphology of produced TiO2 NPs are investigated. Mechanical properties of monolithic Al-Si 16% alloy and Al-Si 16% alloy Nano composites such as tensile strength, ductility, hardness, and toughness were investigated. Such results reflect that the maximum enhancement percentage in the tensile strength, ductility, hardness, and toughness of aluminum alloy occurred at 3 wt. % of NPs and reached to 29.5%, 42%, 54%, and 80%, respectively as compared to monolithic alloy. The disintegration of NPs in the melt of aluminum alloy, as well as grain dispersion growth and dendritic growth limitation, could explain this improvement in mechanical properties.
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