Optimization of Friction Spot Welding Process Parameters for AA2198-T8 Sheets

Abstract

The present work is aimed at the optimization of friction spot welding process parameters for 3.2 mm thick 2198-T8 aluminum alloy sheets; this was performed via a Taguchi-based analysis of the effect of process variables, namely rotation speed, welding time, and plunge depth, on the shear strength of the welded joints. In this study, low or intermediate rotation speed levels showed to be better for the process. Longer welding times and deeper plunge depths led to higher joint strength, although the influence of such parameters is found to be limited above certain values. Hardness profiles and fracture analysis were also performed.