Abstract: The use of dissimilar in thickness welds, especially for the thin aluminium sheets, has been increasing in automobile and civil ship building industries due to its potential for energy saving. The purpose of the present research is to develop the technology of friction stir welding for dissimilar in thickness Al–5Mg alloy butt joints. The thicknesses of the sheets for FSW were 1 mm and 2 mm. The FSW was provided on the 5-axis FSW-machine in horizontal plane with the constant tilt angle equals to 2o, tool rotation speed equals to 700 RPM and welding speed equals to 5 mm/s. The probe high equals to 1; 1.15 and 1.3 mm and dissimilar thick angle in the range from 4o to 6o were taken for the investigation. The macrostructure of the welds was analyzed in order to select defect free welds. The mechanical tests of the selected welds were done.
Authors: Anton A. Naumov, Evgenii V. Chernikov, Fedor I. Isupov, and Oleg V. Panchenko
Keywords: Friction Stir Welding, Dissimilar In Thickness Joint, Al-5Mg Alloy