Authors : Ahmad K. Jassim, Dhia Ch. Ali and Amany Barak
Abstract: A study of the friction stir welding process was carried out in order to evaluate the influence of rotational tool direction and welding speed on the quality of aluminum alloy plates 5052-O with thickness of 14 mm. Welds were made by taper cylindrical pin tool at constant rotational speed of 1120 rpm and different welding speed of 10, 14, 21, 45 and 66 mm/min. Visual inspection, micro hardness test and bending test were done for welded samples. The result shows that friction stir welding with counterclockwise direction of rotational tool produced good welding process. However, with anticlockwise direction welding does not happened and cutting process take place. Moreover, the majority of samples exhibited smooth surface with excessive thinning flash deformation and exit pin hole which can be removed easily from the work piece. In addition, the hardness of welded plates decreased with increasing the welding speed. Friction stir welded plates produced with rotational speed of 1120 rpm and welding speed of 10 mm/min have a good resistance for bending strength which bended without any cracking. Furthermore, the best quality of friction stir welding Al-Mg alloy plates can be obtained at rotational speed of 1120 rpm and welding speed of 10 mm/min.
Ahmad K. Jassim, Dhia Ch. Ali and Amany Barak, 2018. Effect of Tool Rotational Direction and Welding Speed on the Quality of Friction Stir Welded Al-Mg Alloy 5052-O. Journal of Engineering and Applied Sciences, 13: 2352-2358.