Aluminum Alloy 5083 is increasingly used in the ship building industry due to its excellent corrosion resistance and its favorable mechanical properties. A significant application of this alloy is in high speed ferries, where the influence of dynamic loads is of great importance as well. However, the influence of a corrosive environment and/or a welded condition on the fatigue properties of nautical aluminum alloys has been studied only superficially. In the present paper the influence of a seawater environment in combination with a welded state is described. Both fatigue limits and SN-curves are given, as well as a fracture surface analysis. From these results the fracture and crack initiation mechanisms are explained. Particularly the penetration of seawater into sub-surface pores, that are present in the welded material, results in a significant drop in fatigue life time when the welded alloy is tested in seawater.
Fatigue Crack Initiation Behavior of Welded AA5083 in a Seawater Environment
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division October 14, 2003; revision received December 11, 2003. Associate Editor: G. Newaz.
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Benedictus-deVries, S., Bakker , A., Janssen , G. C. A. M., and de Wit, H. (March 18, 2004). "Fatigue Crack Initiation Behavior of Welded AA5083 in a Seawater Environment ." ASME. J. Eng. Mater. Technol. April 2004; 126(2): 199–203. https://doi.org/10.1115/1.1651098
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