ENHANCED MICROSTRUCTURE AND MECHANICAL PROPERTIES OF SIC PARTICLE REINFORCED ALUMINIUM ALLOY COMPOSITE MATERIALS

Manoj Kumar Pal,Vineet Bajaj,Arnav Vikram

doi:10.12776/ams.v25i4.1359

Manoj Kumar Pal, Vineet Bajaj + Show 1 more

Open Access

https://doi.org/10.12776/ams.v25i4.1359

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Abstract

Aluminium6061 alloy composites containing various volume fraction (0-25%) Silicon Carbide (SiC) particles were prepared by stir casting method. In the current study, microstructures and mechanical properties of cast silicon carbide (SiC) reinforced aluminum matrix composites (AMCs) were investigated. Optical microscopic examination, SEM, tensile strength test, hardness test, and elongation test were carried out. The results showed that the addition of SiC reinforcements in aluminum6061 matrix increased hardness and tensile strength however, decreased elongation at 25% SiC reinforced AMC. Hardness and tensile strength were observed to be are maximum at 25% SiC and elongation is minimum at 25% SiC. Microstructural observation confirmed clustering and homogeneous distribution of SiC particles in the Al6061 matrix.

Highlights

High strength, low specific density and good wear resistance are the main keys of the Aluminium matrix composites with incorporation of fourth alloying materials fibers or particles and whiskers
When composite powders are used for the melting, Al6061 start to melt, firstly on the outer surface and on from the inside while gradually releasing the Silicon Carbide (SiC) particles into the molten mix which is evident from a good distribution in the melt [11]
It can be seen that increasing the volume fraction of the SiC particles decreases the ductility of the material while it increases the brittle behavior of material

Summary

Introduction

Low specific density and good wear resistance are the main keys of the Aluminium matrix composites with incorporation of fourth alloying materials fibers or particles and whiskers. The metal reinforced aluminium matrix composites are economical and have good mechanical properties [1]. Several researchers have reported that the use of hard particles (Al2O3 or SiC) in aluminum alloys improve the mechanical properties of these alloys [5]. A non-metallic ceramic such as SiC, Al2O3, SiO2, B4C, Al-N are used in an AMC matrix because of pure aluminium or an alloy of it. Aluminium alloys are used in AMC due to high corrosion resistivity, high damping capacity, low density and good electrical and thermal conductivities [7]. SiC, Boron and Al2O3 particles are affected in tensile strength, hardness and elongation behavior

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