Influência Dos Parâmetros De Friction Stir Processing (Fsp) Nos Aspéctos Macro E Micro De Uma Chapa De Alumínio 1050 Com 3 Mm De Espessura

Pre and post-welding annealing influence on the microstructure of a 7475-T7351 aluminum alloy joining by friction stir welding / Influência do recozimento pré e pós-soldagem na microestrutura de uma liga de alumínio 7475-T7351 que se une por fricção

“…It is also observed that there is no surface defect along the root surface, so the good results obtained can be attributed to a correct choice of welding parameters used and the geometry of the chosen tool. Rotational speed is also an important factor for good welded joint quality [12]. Silva (2018) [17] performed the FSW union of 7475-T7351 aluminum alloys and found a higher presence of cavity-type defects in welded samples with lower rotational speeds.…”

“…These defects may be caused by the low deformation and mixing of material due to the low heat generated. On the other hand, in 2019, Souza and collaborators [12] found that excessive rotational speeds can also generate superficial defects, such as large amounts of barbs.…”

“…All the samples of the different conditions (3FX, 5FX, XFX, XF3 e XF5) were performed with one equipment (Model GG-7, Manufacturer MTI). The tool used in the present study presents a geometry composed of a 12 mm diameter shoulder with undercuts with rings shape and a concentric pin to the shoulder in conical format with bases of 5 mm and 4 diameters, threaded [12]. After the FSW, the plates were conducted for visual analysis, where a mobile phone camera (13 Mpixels) was used to record the images that portray the aspects on the upper and lower faces of the welded plates.…”

“…The FSW results depends on the appropriate choice of welding parameters to be used, such as: traversing speed of the tool (welding speed) [11], rotational speed [7,11,12], tool penetration depth [11], joint type [7], tool inclination angle [13], and one of the most important is tool geometry [7,11,14]. With the correct choice of welding parameters, it is possible to get a joint in the welding region with a greater mechanical resistance than the base material (BM).…”