Mechanical and Microstructural Properties of B4C/W Reinforced Copper Matrix Composite Using a Friction Stir-Welding Process

Copper metal matrix composites (CMC) are broadly employed in various applications the fields of space, aviation, automobile and electronics industries. The welding CMC using conventional methods is very difficult expensive due to its crystallographic nature. Friction stir (FSW) a more prominent reliable technique for than methods. Therefore, this work based on with material, which prepared stir-casting technique. Pure copper (Cu) reinforced tungsten (W) boron carbide (B4C) particles different combinations welded FSW process study mechanical micro-structural properties. Multi-objective decision-making methods, such as order preference by similarity ideal solution (TOPSIS) grey relational analysis (GRA) used find optimal parameter combination. experiments planned according L 18 orthogonal array (OA) most influential parameters, reinforcement percentage B4C, tool rotational speed, axial force. performance outcomes measured responses tensile strength, hardness, impact strength weld joint. Based results 15 % B4C reinforcement, 900 RPM mm/min speed 6 kN forces better TOPSIS GRA techniques. Additionally, scanning electron microscopic image (SEM) analyses were carried out understanding weldments’ microstructure changes.