Fabrication, characterization and particle distribution analysis of al 1050-b4c friction stir surface composite

Abstract

This study aims to fabricate and characterize Boron Carbide reinforced Aluminum matrix surface composite of extremely thin reinforcement depth by friction stir processing. The composites are fabricated with varying number of grooves and number of passes to analyze the change in reinforcement content and change in the distribution pattern of B4C particles. Single groove, double groove, single pass, and double pass are the variations considered. Microscopic analysis of the composites is accomplished using optical microscopy and scanning electron microscopy to show the formation of defect-free surface composite. Hardness and tensile strength are measured to analyze the mechanical properties of the composite. This research also proposes a unique representation called the particle-line intercept method for measuring the reinforcement distribution in the composite. Corrosion behaviour of the surface composite is investigated by polarization curve and electrochemical impedance spectroscopy technique. The reinforcement enhances corrosion resistance. The tribological properties of the composite are tested by performing reciprocating testing. The reinforcement also enhances the wear resistance of the surface composite. Boron carbide reinforcement adversely affects the conductivity of the composite.