Influence of Friction Stir Welding Parameters on Properties of Al-6061(F) Alloy
Welding of non-ferrous materials like aluminum, magnesium, copper etc, is difficult with conventional welding
process as they are affected by oxidation. Friction stir welding (FSW) appears as a promisingly ecological weld method that
enable to reduce material waste and to avoid radiation and harmful gas emissions usually associated with fusion welding
processes. The welded joints are mainly affected by the rotational speed and transverse speed of the tool during welding. As
the tool rotation speed and feed increases the tensile strength and hardness values are improved at the weld joint. Tensile
strength and hardness can also be affected by the tool design. The tool designs like flat shouldered, concave shouldered and
convex shouldered with different profiles like concentric circles can affect the welded joints. The material flow rate can be
minimized by using concave shouldered tools.
Index Terms— Friction Stir Welding, Aluminum 6061 Alloy, Concave Shouldered Tool.