Ball Burnishing of Friction Stir Welded Aluminum Alloy 2024-T3: Experimental and Numerical Studies

This paper deals with the improvement of material surface state friction stir welding paths modified in situ by plastic deformation through ball burnishing. The metallurgical and topological states materials joined this technique are typically detrimental to ulterior performance workpiece, it is believed that burnishing can improve these enhance functioning. study divided into two phases. first one experimental consists aluminum AA2024-T3 plates while combining different tool rotations speeds. Then, line deformed locally topology deep hardness distribution measured discussed, evolution mechanical properties assessed tensile tests. second phase oriented towards estimating residual stresses pre-existing models developed same authors using ANSYS®. Friction experimentation measurements show a decrease values all compared original material. dominant factor affecting texture rotational speed tool, rupture point test located distinct zone lowest value microhardness on advancing side. higher ratio speed, lower roughness value. Finally, proven be an effective method integrity welded joints light results, achieving reduction 11% 36% average increase about 22% profile, along integrated numerical model estimation remarkable effect compressive in-depth retreating side samples. However, some tests, treatment reduced characteristics (yield stress failure strain).