Original scientific paper
https://doi.org/10.31534/engmod.2026.2.ri.01v
Influence of Corrosion on the Fatigue Behaviour of 5083 Lap-Welded Joints
Tomislav Matić
; Faculty of Science, University of Split, Ruđera Boškovića 33, Split, CROATIA
*
Dražen Kustura
; Faculty of Science, University of Split, Ruđera Boškovića 33, Split, CROATIA
Ivan Peko
; Faculty of Science, University of Split, Ruđera Boškovića 33, Split, CROATIA
Francisko Lukša
; Faculty of Maritime Studies, University of Split, Ruđera Boškovića 37, Split, CROATIA
* Corresponding author.
Abstract
The design and durability of welded aluminium structures, commonly used in the marine, aerospace, and automotive industries, require a thorough understanding of their mechanical performance under cyclic loading and various environmental conditions, including corrosion. Aluminium–magnesium alloys (such as 5083) are widely used in marine applications due to their favourable strength-to-weight ratio and inherent corrosion resistance. However, prolonged exposure to harsh environments inevitably leads to corrosion-induced damage, which negatively affects the fatigue strength of welded joints.
This study investigates the influence of corrosion on the fatigue behaviour of lap-welded 5083 aluminium joints through a controlled experimental programme. Fatigue tests were conducted on two groups of specimens: one with corrosion damage and the other uncorroded. Comparative analysis of the fatigue life data indicates a reduction in fatigue strength attributable to corrosion. Specifically, the fatigue strength at 2·10⁶ cycles is reduced by approximately 50% or 38%, depending on whether the nominal stress approach or the notch stress approach is used for fatigue assessment.
Keywords
5083 aluminium alloy; accelerated pre-corrosion; pitting; bending fatigue; notch stress approach
Hrčak ID:
351928
URI
Publication date:
7.10.2026.
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