JOINING OF FERROUS AND NON FERROUS MATERIALS IN FRICTION STIR WELDING

Abstract

In this work joining of two dissimilar ferrous and non-ferrous materials was carried out in 5-axis friction stir welding machine. The friction stir welding is a solid state joining process that uses a third body to join two facing surfaces. The high range quality weld can be created by the friction stir welding process. The weld obtained by varying it’s rotation speed, tool offset, travel speed, and maintain the constant tilt angle(2?) and pin diameter 2.7mm. The weld sample viewed under Optical microscope was carried out to study the welding zone at different welded parts. The obtained result shows the better interlocking and bonding of material occurs at 840 rpm, -1.4mm (rotational speed, offset). The Bending strength is better when the tool is offset towards advancing side (-1mm) because of complete fusion of Harder material. The offset towards the retreating side, result in lack of insufficient heat generation on advancing side, so incomplete fusion advancing side. Shoulder diameter, pin diameter and Dwell time has greatest impact on heat generation. Keywords: FSW, dissimilar materials, microstructure, Bending.