IX. UMTEB INTERNATIONAL CONGRESS ON VOCATIONAL & TECHNICAL SCIENCES, Gaziantep, Türkiye, 7 - 08 Şubat 2020, ss.86
Aluminium alloys are widely used in the automotive industry for the production of transmission parts and components because of high strength to weight ratio, excellent castability, and low cost. Transmission parts and components that are manufactured from Al-based alloys are therefore attractive for the automotive industry. Alloying elements such as silicon and copper improve tensile properties and high-temperature strength of Al alloys. However, high temperature and wear occurred during the service life of transmission parts and components produced from Al-based alloys can be important problems for the automotive manufacturers. In order to improve the mechanical properties of Al-based alloys, these alloys are reinforced with micro and nano-sized particles. Nano-sized reinforcement particles have a stronger influence on the microstructure and mechanical properties of particle-reinforced composites compared to those of micro-sized reinforcement particles. The Al-based alloy which is used for the production of the cover in the transmission pump used in the automobile was reinforced with nano-sized ceramic particles, and Al-based alloys reinforced ceramic particles were produced via the stir-casting method in this study. The effects of production parameters (stirring speed and casting temperature) on the mechanical properties of cast Al-based alloy and particle reinforced Al-based composites were investigated. The results showed that the mechanical properties of the particle reinforced Al-based composites were improved due to nano-sized reinforcement particles compared to unreinforced Al-based alloy. The hardness and flexural strength of the composite samples increased with the increase in weight fraction of nano-sized reinforcement particles. Similarly, the mechanical properties of the nano-particle reinforced Al-based composite samples improved as the casting temperature was increased since of the fact that an increase in casting temperature increases the fluidity of the molten alloy. However, the higher weight fraction of nano-sized particles results in a significant deteriorating influence on the mechanical properties of nano-particle reinforced Al-based composites.
Keywords: Al-based alloy, nanocomposite, casting, stirring speed