Effect of MIG welding process on mechanical properties of butt welded joints of similar and dissimilar aluminum alloys 2024-T351 and 6082-T6 – a comparative analysis
adragan.milcic@masfak.ni.ac.rs
a0000-0002-3936-7462- b0000-0002-1089-8390
- c0000-0002-1866-8266
- d0000-0001-6085-7522
- e0000-0002-6130-0328
- f0000-0002-0251-6364
- DOI: 10.65156/wws.sjdp.si.003
- Article Type: Original scientific paper
- Language: Serbian/English
- Received: February 2026
- Accepted: July 2026
Abstract
This paper presents a comparative analysis of the effect of the MIG welding process on the mechanical properties and microstructure of butt welded joints of similar aluminum alloys 2024-T351 and dissimilar aluminum alloys 2024-T351 and 6082-T6. The filler material used was wire EN ISO 18273: S Al 4043A (AlSi5(A)), and the shielding gas was an argon-helium mixture (ISO 14175 – I3 – ArHe-30). The mechanical properties of the welded joints were evaluated by Vickers hardness testing, tensile testing, and bend testing. Microstructural analysis was performed using light microscopy (LM) and scanning electron microscopy (SEM). The results show that the MIG welding process causes a significant reduction in strength and hardness in the weld metal and heat-affected zone (HAZ) for both alloy combinations. Fracture during tensile testing of the similar alloy joint occurs in the weld metal and exhibits a brittle fracture character, whereas in the dissimilar alloy joint fracture occurs in the base metal 6082-T6 and exhibits a ductile fracture character.
Keywords
MIG welding process, aluminum alloy 2024-T351, aluminum alloy 6082-T6, similar welded joints, dissimilar welded joints, mechanical properties
References
Under construction
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