A Comprehensive Study of Microstructure and Mechanical Properties in Friction Stir Welded AA 2024 and Nano particle Reinforced Hybrid Composites

Abstract

The hybrid metal matrix composites have been composed of the AA 2024 matrix, the Silicon Nitride (Si3N4), and Aluminium Nitride (AlN) particle reinforcements through stir casting route with various combinations such as 0,2,4,6 & 8 wt%. The hybrid composites were successfully welded by the friction welding process with the various input parameters. The input parameters are Tool Rotational Speed (RPM), welding speed (mm/min), and Axial force (L). In this investigation, the L25 orthogonal array was used to conduct experiments, and the mechanical and metallurgical investigations are taken. Finally, the reinforcement particles were distributed evenly in the matrix. After successful welding 8wt% reinforced sample achieved higher mechanical properties as well and the heat-affected zone and weldment area were investigated and found that the weld strength improved.

Keywords

• Aluminium matrix composites (AMC)
• Friction stir welding (FSW)
• Deformation
• Hardness
• Tensile Strength
• Flash out
• Dispersion
• Taguchi method

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