Abstract
The effect of extrusion ratio and addition of glass and fly ash on microstructural, mechanical properties, and fracture behavior of Al composites is examined. Both the composites and hybrid composites are prepared by the liquid metallurgical technique. Microstructure, extrusion effect on hardness, tensile properties, and fracture are studied using an optical micrograph, hardness tester, Universal Testing Machine, and scanning electron microscope, respectively. Experimental results show that increasing the extrusion ratio leads to a significant enhancement in mechanical properties such as tensile, compression, and yield strength and Young’s modulus, but results in a small reduction of ductility. It has been revealed that the presence of glass and fly ash improve the mechanical properties significantly with a slight reduction in ductility compared to the Al alloy. Fracture behaviour of the base alloy and composites show intergranular ductile and brittle cleavage mode failure as observed by SEM.
Highlights
Due to numerous advantages such as castability, high toughness, and corrosion resistance, aluminium alloy and its metal matrix composite (MMC) have a wide range of applications in various engineering sectors such as automotive, aerospace, and marine industries, among others [1,2,3]
Many researchers claim that the average particle size reduces due to the extrusion process because of particle fragmentation leading to the improvement in mechanical properties such as ultimate tensile strength, hardness, and even ductility to some extent. e fragmented particles significantly modify the microstructure of composites by inducing higher dislocation density induced in the matrix alloy
The addition of reinforcement and extrusion is achieved in singletype reinforcement Al composites, no research work so far has focused on the extrusion process to produce hybrid composites. e objective of this work is to investigate the effect of extrusion on the mechanical properties of Al/glass, Al/fly ash, and Al/glass/fly ash composites
Summary
Due to numerous advantages such as castability, high toughness, and corrosion resistance, aluminium alloy and its MMCs have a wide range of applications in various engineering sectors such as automotive, aerospace, and marine industries, among others [1,2,3]. Many researchers [14,15,16] claim that the quality of casting is improved by secondary processes such as rolling or forging or extrusion by means of reduction of porosity and uniform distribution of particles in the matrix alloy. Many researchers claim that the average particle size reduces due to the extrusion process because of particle fragmentation leading to the improvement in mechanical properties such as ultimate tensile strength, hardness, and even ductility to some extent. E fragmented particles (nano or micro) significantly modify the microstructure of composites by inducing higher dislocation density induced in the matrix alloy. Extruded alloy composite microstructures show that the coarse grains of the matrix alloy are refined to a considerable extent which results in the improvement of hardness, tensile strength, and wear resistance of the composite material. The addition of reinforcement and extrusion is achieved in singletype reinforcement Al composites, no research work so far has focused on the extrusion process to produce hybrid composites (one shorter fiber and particles). e objective of this work is to investigate the effect of extrusion on the mechanical properties of Al/glass, Al/fly ash, and Al/glass/fly ash composites
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