This work focuses on the influence of the rotational and travel speed on the strength of AA 2024 T3 friction stir welded lap joints.\nTensile tests were carried out on minispecimens extracted from different welding zones. A central composite design was applied to\nidentify the relative importance of the variable factorsâ?? effects and their interaction on yield/ultimate strength and elongation for\nboth the heat affected-zone (HAZ) and nugget zone. Surface methods and gradient algorithms were used to optimize the yield\nstrength of the joints. Shear and microhardness tests were executed to achieve a more complete mechanical characterization.
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