Effect of welding speed on the mechanical properties of AA6061 Al alloy joined by friction stir welding

In this study, AA6061 alloys were connected via friction stir welding to a fixed rotation speed with different welding speeds (FSW). The hand tappers in the stirring tool in the welding process were made from a 1900-diameter shoulder and modified M6 x 1 HSS hand taps. The FSW was manufactured with the rotating velocity of 1500 to 30 mm, 50 mm and 60 mm/min. In mechanical and metallographic tests and the mechanical and metallurgical properties of welding specimens, the effects of welding speed were examined in welded joints. The welding speed had a significant impact on the joint's microstructure and mechanical characteristics. The findings showed that the soldering nugget has decreased on average at a higher welding speed. In addition, a high welding speed had negative consequences for the weld nugget's mechanical properties. Copyright (C) 2021 Elsevier Ltd. All rights reserved.