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Significance of the superposition of cyclic mechanical and corrosive loadings in the qualification process of aluminium alloys

: Bauer-Troßmann, Kathrin; Yu, L.; Melz, Tobias; Oechsner, Michael; Kaufmann, Heinz

Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit -LBF-, Darmstadt:
4th Symposium on Structural Durability, SoSDiD 2014. Proceedings : May 14th-15th, 2014, Darmstadt, Germany, MARITIM Konferenzhotel
Stuttgart: Fraunhofer Verlag, 2014
ISBN: 3-8396-0734-5
ISBN: 978-3-8396-0734-3
Symposium on Structural Durability (SoSDiD) <4, 2014, Darmstadt>
Fraunhofer LBF ()
aluminium alloys; corrosive loading

In order to take advantage of the potential of new high strength aluminium alloys for corrosion fatigue loaded components, it is of importance to qualify their suitability regarding superposed mechanical and corrosive loadings prior to established validation tests such as the structural durability proof.
Up to now selection of potential aluminium alloys for chassis applications is based on stand-alone mechanical and fatigue properties as well as a wide range of alloy-specific corrosion tests not taking into account simultaneous cyclic mechanical and corrosive loadings occurring in service.
Within this paper, approaches comprising fatigue testing in air, pre-corrosion with consecutive fatigue testing and corrosion fatigue tests are discussed regarding their suitability to assess the behaviour of aluminium alloys under operating conditions.
Aluminium alloys of different alloy series with different sensitisation conditions towards corrosion are included in this review.