An Application of CCD in RSM to Obtain Optimize Treatment of Eccentric-Weave Friction Stir Welding Between Polyether-Ether-Ketone Polymer and AA 6061-T6 with Reinforced Multiwall

The heat treatment of aluminium–PEEK (poly-ether-ether-ketone) alloy finds wide application in the aerospace and defence industry for its effective rate in strength to weight ratio and for good ductility. Friction Stir Welding (FSW) process (an emerging solid state joining process) is suitable for joining this alloy compared to fusion welding processes. The most significant process parameters are tool speed, feed rate, tool pin offset and axial force. By using central composite design and by employing Response Surface Methodology (RSM), regression models were developed to predict the responses. The mechanical properties, such as Ultimate Tensile Strength (UTS), impact strength and volumetric dispersion are considered as responses.