Effect of CMT Welding Speed on Mechanical Property and Formability of Aluminium Alloy AA5052MT

Abstract

This research aimed to investigate and evaluate the effect of CMT welding speed on the tensile strength and formability of AA5052 aluminum alloy. Aluminum is a widely used material in the automotive industry due to its strength and lightweight. Optimum welds were evaluated and analyzed based on the tensile strength and formability results. The formability was examined by the Erichsen Cupping test method. The experimental results showed that the damage to samples welded at different speeds is independent of the mechanical properties of the substrate. However, welded samples with low welding speeds have better tensile strength than high welding speeds. In addition, the results of the Eriksson method showed that the low-speed welded samples had significantly higher formability. Because of the deeper forming of the cup before failure. In low-speed conditions, fractures begin to occur in the substrate near the weld seam together with fractures across the weld seam. Inversely, the higher welding speeds the fracture occurs at the center of the weld seam, and the fracture direction is parallel to the weld seam.