Research On Mechanical Properties Of Tig Welded Aluminum Alloy

Different welding parameters (welding current 165 A, 180 A, and 200 A) and weld groove angle values were changed in order to evaluate mechanical properties of Tungsten Inert Gas (TIG) welded. Different groove angles (60 degrees, 70 degrees, 80 degrees, and 90 degrees) have been chosen to identify the peculiarities of weldment structure formation and the resultant quality of the weld. Mechanical properties were assessed in the terms of Vickers HV1 hardness and tensile strength testing. The transverse tensile tests were executed on the welded samples to ascertain influence of welding current and groove geometry to the tensile strength of weld joint and its working conditions during exploitation. The obtained results proved that the tensile strength of the welded samples is closely connected with welding parameters: the highest welding current 180A ensured the highest tensile strength of welded samples, in the same way as the biggest groove angle 90 degrees made up good conditions for proper fusion and the adequate quality of major welds, herewith good penetration and adhesion of weld and base metal directly proportional to welding current.