Investigation of Mechanical Properties and Microstructure of AZ31-SiC-Graphite Hybrid Nanocomposites Fabricated by Bottom Pouring-Type Stir Casting Machines

Abstract

In this study, a bottom pouring-type stir casting machine was used to create AZ31 magnesium alloy hybrid nanocomposites with varying weight percentages (0, 3, 5, and 7) of silicon carbide (SiC) and graphite (Gr) particles. Investigations have been made into the mechanical characteristics and microstructural distribution of manufactured hybrid nanocomposites. The outcomes demonstrate that the mechanical characteristics and uniform distribution of SiC and Gr particles are enhanced compared to those of the base alloy. In comparison to monolithic AZ31 alloy, microhardness, ultimate tensile strength (UTS), yield strength (YS), and compressive strength (CS) were raised by about 54%, 68%, 82%, and 107%, respectively. The presence of reinforced particles, the uniform distribution of particles, and the strong interfacial connection between the matrix and reinforcement all contribute to the improvement of mechanical properties. However, the addition of 7 wt. % SiC/Gr showed good mechanical properties compared to the base alloy. The microstructure of nanocomposites was analyzed using a scanning electron microscope (SEM), and particles were described using energy-dispersive spectroscopy (EDS).

SiC actions on characteristics analysis of AZ91D hybrid nanocomposite by liquid state processing

“…Compared to monolithic magnesium alloy, the 7% silicon carbide (SiC)/graphite (Gr) hybrid nanocomposite showed higher tensile and microhardness. 25 The AZ91D alloy hybrid composite was blended with 1.5 wt% of boron carbide (B 4 C) and 1.5 wt% Gr particle via stir casting route found 1.11% porosity, 22.5BHN, and 86.3 N/mm 2 ultimate tensile strength, which is higher than the values of AZ91D. 26 In addition, the silicon carbide (SiC) provides a better lubricant effect during the AZ91D/Gr composite blending reported by Khatkar et al 27 The behavior of vacuum stir caste developed Al-Zn-Mg hybrid composite was experimentally evaluated, and its results showed better corrosion and mechanical behavior.…”

“…A bottom pouring stir cast was utilized for magnesium alloy hybrid nanocomposite preparation, and its mechanical behavior was evaluated. Compared to monolithic magnesium alloy, the 7% silicon carbide (SiC)/graphite (Gr) hybrid nanocomposite showed higher tensile and microhardness 25 . The AZ91D alloy hybrid composite was blended with 1.5 wt% of boron carbide (B 4 C) and 1.5 wt% Gr particle via stir casting route found 1.11% porosity, 22.5BHN, and 86.3 N/mm 2 ultimate tensile strength, which is higher than the values of AZ91D 26 .…”