The effect of rounds of the Friction Stir Welding tool (FSW) in determining of fatigue life of T6-7075 aluminum alloy

Subject Areas : Creep, Fatigue and Fracture Mechanic

Mohamad Jafar  Ostad Ahmad Ghorabi ¹ (Department of Mechanical Engineering, Semnan Branch, Islamic Azad University, Semnan, Iran)
Reza  Samieifard ² (Energy and Sustainable Development Research Center, Semnan Branch, Islamic Azad University, Semnan, Iran)

Received: 2021-07-27 Accepted : 2021-11-01 Published : 2022-02-20

Keywords: Friction welding, aluminum alloy T6-7075, rounds in the welding tool,

Abstract :

In this article, the use of Friction Stir Welding (FSW) process to create a proper connection of 7075 aluminum alloy parts and the effect of the number of revolutions of the welding tool on the fatigue life of the weld area have been investigated. After the process, using the optimization parameters, the fatigue life of the base metal and weld metal of the welded samples was obtained. The results show that performing the fusion-friction welding process by changing the number of revolutions of the welding tool on the fatigue life of the T6-7075 aluminum alloy welding zone has increased the fatigue life in the fusion zone, which is caused by the heat produced due to friction and the severe shape change of the material in It is during welding. Also, investigations showed that in the weld metal and its surroundings, a weaker area in terms of fatigue life than the base metal has been formed.