Optimization of parameters on friction stir welding of AA 6061-T6 aluminium alloy.

The process FSW is a solid-state welding technique which are becoming more and more popular in the field of automotives and the aerospace industries for the joining metals like copper, magnesium, and aluminum. Unlike traditional welding methods, friction stir welding eliminates the need for material melting and recasting. In aircraft applications, the most commonly utilized non-precipitation hardenable aluminum alloy series are 3xxx and 5xxx, whereas the precipitation hardenable series are 2xxx, 6xxx, and 7xxx. The joint properties in friction stir welding are influenced by a number of factors, such as the tools tilt angle, the speed of welding, and the tools-rotational speed. A mathematical model that demonstrated the relationship between these parameters and the final weld attributes (tensile strength, hardness, and elongation) was developed using the response surface approach. The model considered three parameters with three levels each, and it ran 15 times in total. This study is focused on the friction stir welding {FSW}method of AA6061-T6 aluminum plates using a cylindrical pin profile tool, various rotating speeds (1000, 1200, 1400 r/min), welding speeds (20, 30, 35 mm/min), axial tensions (5, 6, 7 KN), and a tool tilt angle of 0°. The responses plots obtained from the help of the mathematical models which is used to analyze the interaction effects on the basis of the welding specifications on the responses variables. The Friction stir welding process is an effective method for the maintenance of the mechanical and the metallurgical properties of aluminum alloys. The purpose of this inquiry was to optimize three parameters to increase tensile strength and hardness of the welded plates junction between AA6061-T6. [ABSTRACT FROM AUTHOR]