FRICTION WELDING OF AL-AL, AL-STEEL, AND STEEL-STEEL SAMPLES

Friction welding of Al-Al, Al-steel, and steel-steel studs is compared . Transient heat generation and temperature rise during the welding pr ocess were modeled. Tensile tests and microhardness measurements acros s the weld zone were carried out. The metallurgical changes in the hea t-affected zone were examined by SEM. Temperature rise at the interfac e plane was computed and related to weld properties. The affecting par ameters on weld quality were identified by statistical analysis. Resul ts show that interaction of weld parameters significantly affect yield , tensile, and breaking strength, and the heat-affected zone on the Al side is wider for Al-steel welds.