Microstructure and mechanical properties of AA 5754 H22 aluminium alloy welded by robotic GMAV process

Keywords: Robotic welding, MIG, Optimum parameter, Microstructure, Aluminium, AlloyMIG method has become the most preferred and and the most wanted method in the welding of all the nonferro metals and alloys due to its convenience. In the welding operations with the usage of robotic MIG method, that there are no defects which arise from welding operator has been the factor that increased the availability and reliability of this method. In a study done by starting from this point, aluminium sheets have been welded with robotic MIG method in different parameters and their microstructure and mechanical properties have been analysed. The welding operation has been done horizontally and in room temparature. In welding with robotic MIG method a different weld current, welding progress speed and weld voltage have been applied; gas flow, DC pulse method, free wire lenght and protective gas have been kept stable.welded plates have been exposed to tensile test, bending test and microhardness analsis; with the aid of stereoscope their macrostructure images and with the optic microscope their microstructure images have been acquired.In this study optimum welding parameters have been reached . Also it was shown that the changed welding parameters affected the mechanical properties. These optimum parameters are believed to be important in their usage in industry.