Abstract
The effect of welding parameters on mechanical properties of aluminum alloy AA 2024-O Friction stir-welded (FSW) joints was investigated in the present study. Taguchi method was used to evaluate the optimum value of process parameters from tensile tests using nine experiments designed according to the matrix proposed by the scientist Taguchi for the design of experiments (L9) using two parameters (welding speed and rotation speed). Two different process parameters have been selected: rotational speeds of 1300,1500 and 1700 rpm and feed speeds of 20,40 and 60 mm/min. The design of experiments (DOE) is performed by L9 (3Λ2) orthogonal array (9 experiments, two variables, three levels). Also, the signal–to–noise (S/N) ratio larger is better has been performed for analyzing the results σu for FSW &FSP) by the statistical software (MINITABTM ® 16). The best results of the weld gained at the parameter 40 mm/min travel speed and 1300 rpm rotation speed. The efficiency obtained was 95% respect to the ultimate tensile strength (UTS) of the base metal. In addition, the analysis of variance (ANOVA) techniques has also been performed by the statistical software (DOE Pro XL) to identify the essential factors that are affecting the ultimate tensile strength (UTS) for FSW.
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