Abstract
In the automotive industry 6xxx aluminium alloys are preferred materials, yet their fabrication contributes to a considerable carbon footprint. A promising strategy to mitigate the environmental impact is the increased utilisation of recycled (secondary) aluminium, sourced from diverse scrap streams. However, as aluminium scraps come from different sources, the intrinsic variability of chemical composition, stemming from uncontrollable levels, poses a challenge, impacting material properties and weldability. Balancing manufacturability while enhancing the adoption of recycled alloys becomes a critical effort. This study aims at benchmarking wire-fed and autogenous laser beam welding to study the effect of Cu inclusions on weld integrity of 6060-T6 extrusion. The paper contributes to show the impact of Cu addition during laser welding of 6060-T6 aluminium alloys. Findings highlighted that the modification of chemical composition using filler wires is currently the most efficient approach to improve joint strength, although the Cu additions tend to reduce the weld strength.
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