Microstructural evolution, mechanical and nanoindentation studies of stir cast binary and ternary aluminium based composites

The superior qualities offered by aluminium matrix composites (AMC) over the years has made it a widely used material for the fabrication of various components in the engineering sector. The effect of silicon carbide and ferrotitanium particles addition on the properties of stir cast aluminium-based composite was investigated. Stir casting technique was employed to ensure homogeneous dispersion of the reinforcement particles within the aluminium matrix. The microstructural, mechanical and tribological properties of the specimens were further assessed to determine the integrity of the fabricated composites. Results from microstructural examination showed a uniform dispersion of the reinforcement particles within the aluminium matrix. The reduced wear rate recorded by the composite reinforced with 5 wt% SiC +2 wt% TiFe resulted from the sliding of the stainless steel counterface over the oxide layers formed on the specimen surface. The specimen reinforced with 5 wt% TiFe +2 wt% SiC exhibited an enhanced tensile and nanomechanical properties, while the binary composite system with 5 wt% TiFe reinforcement had its wear resistance and modulus of elasticity improved. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

Aluminium matrix composites (AMC) has been widely used in the engineering sector due to its superior qualities. The addition of silicon carbide and ferrotitanium particles in stir cast aluminium-based composite can improve its properties. Stir casting technique ensures homogeneous dispersion of the reinforcement particles within the aluminium matrix, leading to enhanced microstructural, mechanical, and tribological properties.