Prediction of Tensile Strength and Optimization of Process Parameters for Friction Stir Welded AZ31B Magnesium Alloy

Abstract

An attempt has been made to develop an empirical relationship to predict the tensile strength of friction stir welded AZ31B magnesium alloy by incorporating process parameters such as tool rotational speed, welding speed, and axial force. The experiments were conducted based on three factors, three levels of central composite face centred design with a full replications technique. The developed relationship can be effectively used to predict the tensile strength of friction stir welded joints at the 95 per cent confidence level. The results indicate that tool rotational speed has the greatest influence on tensile strength, followed by welding speed and axial force.