Paper Title
Influence of Friction Stir Welding Parameters on Properties of Al-6061(F) Alloy

Abstract
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.