Influence of Rotatory speed and Frictional Pressure on Tensile Strength of Friction Welded Mild Steel/AISI 304 L Joints

Mild steel and AISI 304 L have gained widespread usage across diverse industries, such as naval vessels, boilers, aviation, and automobile sector, due to their ready availability and distinct attributes. Fusion welding techniques have been employed to join this alloy, which is known for its specific qualities. The strength of welded joints is directly proportional to a certain percentage of the strength exhibited by the base materials. However, the welding process becomes intricate when dissimilar steels need to be joined. In such cases, achieving consistent and reliable welding become a challenge. Therefore, meticulous attention is required in the selection of electrodes, filler wires, and other operational parameters, such as current, voltage, and shielding gas. Among the solid-state joining methods, FW (Friction Welding) stands out as an excellent approach to achieving robust joints. This technique ensures strong joint formation. In this study, two pivotal FW parameters viz. rotational speed and friction force were employed to investigate their effects on joint strength. The aim was to optimize these two parameters for achieving higher joint strength, The outcome of this investigation reveals that a rotational speed of 1000 rpm and forging pressure of 35MPa results in successful welding joint. The maximum joint strength of dissimilar joint was found 375 MPa. It could be achieved by the balanced flow of plasticized material at the interface of the joint.