Friction welding is a solid-state weld process that utilizes mechanical friction and pressure to join two materials together without melting. During the process, one workpiece is shifted in relation to another—usually by rotation or linear oscillation—while under high compressive force. The resulting friction produces heat at the interface, which causes the materials to soften and bec... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php