Effect of Time on the Joints Quality of Dissimilar Metals Welded by Friction Stud Welding Process

Abstract

Friction stud welding process parameters such as rotational speed, friction pressure, forging pressure, and times of process affect the welding quality of dissimilar metals. To enhance welding quality, choosing better parameters is the best option. The aim of this research is to produce strong welding joints by applying a special procedure, that decreases the time to reach the maximum friction pressure at the selected welding parameters. The selected parameters were rotational speed of 1600 rpm, friction pressure of 15 Ma, friction time of 15 seconds, forging pressure of 30 MPa, forging time of 30 seconds, and the time to reach maximum friction pressure of (1, 3, and 5 seconds) while the materials welded were 304 AISI and 1017 AISI. The weld quality was determined from torque, tensile, microstructure, hardness, and x-ray tests. The findings were the mechanical and physical properties improved while the microstructure showed coarser grain sizes by reducing the time to reach maximum friction pressure.