Friction stir welding (FSW) is a newly developed welding technology for welding of soft alloys. This is a solid state welding process in which the work material which is to be welded does not get melt and a joint can be easily obtained without the use of some additional filler material, gas protection or any other precaution. A hard rotating tool with a profile pin/probe and a shoulder gets inserted into the joint line and with the help of suitable transverse weld feed with some axially downward pressure the weld can be produced. Here the effect of three transverse weld feeds of FSW welding of AA6061 keeping rotational speed and axial pressure constant, were examined on the basis of weld microstructure and tensile properties. It was found that the microstructure of AA6061 is fine for low transverse weld feed as comparison to the other transverse feeds and on this transverse feed the tensile properties of the weld metal is higher than that of other two welding transverse feeds.
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