Investigation of Mechanical Properties of Aluminum 5754-7075 Alloys Joined by Cold Metal Transfer by Using Different Gas Pressures

Abstract

In this study, Aluminium 5754-7075 plates in 2.0 mm thickness were joined by magnesium-based (AlMg5) wire in cold metal transfer (CMT) technique. The specimens were prepared in butt joint form. Argon was used as shielding gas and joining operations were done with 20o working angle. Joining operations were done with four different gas pressures as 10, 12 14, 16 l/min. After that, tensile properties of joints were determined and macro-structures of joints were investigated in order to see the joinability of aluminium 5754-7075 alloy by CMT (cold metal transfer) technique. Finally, the micro-hardness values of specimens were measured.