Investigation of the welding capability of aluminum and titanium alloy sheets with if steel sheets by resistance spot welding method

Abstract

In this study, spot weldability of 1 mm thick IF 180 deep drawn high strength steel with 1 mm thick commercial pure titanium (ASTM Grade 2) and 5754 aluminum alloy was investigated. The welding operations were performed with different welding currents (10 kA, 12.5 kA and 15 kA), welding times (10, 15 and 20 cycles) and electrode forces (5 kN, 10 kN and 15 kN) by electrical resistance spot welding. The welding nugget diameter, electrode immersion depth, hardness and tensile-shear test results of the welded samples were examined and the mechanical properties were compared. As a result of the tests, it was seen that the welding parameters had a greater effect on the mechanical properties of the IF 180-5754 Al alloy welding pair than the IF 180 - Ti-Gr2 alloy pair. It has been determined that the welding current and electrode force significantly affect the nugget diameter, electrode immersion depth and the maximum tensile force in both welding pairs.