Development of mathematical model to predict the ultimate tensile strength of friction stir welded dissimilar aluminum alloy

Abstract

Development of the Friction Stir Welding (FSW) has provided an alternative improved way of producing aluminium joints, in a faster and reliable manner. This pa-per presents a systematic approach to develop a mathema-tical model for predicting the Ultimate Tensile Strength (UTS) of dissimilar aluminum alloy (AA6351 T6 - AA5083 H111) joints by incorporating the Friction Stir Welding (FSW) process parameter such as tool pin profile, tool rotational speed, welding speed, and axial force. The experiment was conducted based on four factors five level central composite rotatable deign with full replication technique. The Response Surface Method (RSM) was employed to develop the model. The developed model was validated using the statistical tool analysis of variance (ANOVA). Conformity tests were carried out to check the accuracy of the developed model. The effects of the FSW process parameters on ultimate tensile strength of friction welded dissimilar joints were discussed in detail.