Effect of Pulse Frequency on Mechanical Properties of Nd:YAG Laser Welded Dissimilar DP Steels
Oguz Tuncel Hakan Aydin Sukriye Cetin
AbstractIn this study, the DP600 and DP1000 steel sheets were joined with the pulsed Nd: YAG (Neodymium-doped Yttrium Aluminum Garnet (Y3Al5O12)) laser welding and mechanical properties of the welds were investigated. Performing dissimilar weld of DP steel sheets is an inevitable demand in the modern automotive industry. In the laser welding process the selection of the welding parameters affects the final properties of the welds substantially. So, the main objective of this study was determining the influence of pulse frequency on the mechanical properties of pulsed Nd:YAG laser welded DP600-DP1000 steel sheet joints. So, dissimilar (DP600-DP1000) steel sheets were welded in the flat position with the butt joint. In order to evaluate the welding performance, macrostructural studies and mechanical tests were performed and experiments carried out in this context including optical microscope examinations, tensile tests and Vickers microhardness measurements.