Results on Optimizing the Parameters for Friction Stir Welding of Dissimilar Aluminium Alloys AA 5383/AA 7075

The demand for aluminium alloys, which exhibit very attractive mechanical , physical and chemical properties, is strong in different areas , in particular the marine structure. Different welding methods are used to join aluminium alloys, but the new innovative and environmentally friendly techniques are friction stir welding. Dissimilar aluminium alloys AA 5383 and AA7075 have been combined with friction stir welding in this report. Tool rotation speed, transverse feed varying to 700, 800, 900 rpm and 40, 60, 80 mm / min are the variables affecting the welding parameter. By keeping the axial force constant at 10 kN, the 6 mm plates are joined. Using a square instrument with a pin diameter of 8 mm, welding is done. Using hardness testing to know the wear resistance of the weld metal and tensile testing to know the properties and ductility of a weld, the impact of the welding parameters selected is assessed. The overall tensile strength obtained is a high tensile strength of 211 MPa for the 700 rpm parameter and 40 mm / min transverse feed. The Weld quality has been studied for different rotational velocity and transverse feed tools. The joint is affected by the lack of heat input as the transverse feed rises and its tensile properties are affected. The instrument rotational speed of 700 rpm with 40 mm / min transverse feed gives excellent mechanical properties of both tensile and hardness from the experiment carried out.

Author(s) Details

Dr. G. Rajamurugan

School of Mechanical Engineering, Vellore Institute of Technology, Vellore, India.

S. Sivachidambaram
Department of Mechanical Engineering, Bannari Amman Institute of Technology, Erode, India.

D. Amirtharaj
Department of Mechanical Engineering, Bannari Amman Institute of Technology, Erode, India.

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