Influence of magnesium addition on the mechanical and corrosion responses of 7249 aluminum alloy

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Date
2010-11
Authors
Adeosun, S.O.
Sekunowo, I.O.
Balogun, S.A.
Oladoye, A.M.
Osoba, L.O.
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Corrosion Science and Engineering
Abstract
The effects of 1.8-2.6% Magnesium addition on the mechanical and corrosion responses of 7249 aluminum alloy have been studied. Samples of the alloy in as-cast, T6 and RRA forms were made and subjected to tensile and hardness tests. Exfoliation, ferric-chloride and immersion corrosion analyzes were also carried out on the alloy forms. The results show that strength and hardness increased at the expense of ductility as the Mg content is increased to 2.6 %. RRA form exhibited the best tensile and hardness properties coupled with superior corrosion resistance. This characteristic behaviour of RRA form is predicated on the precipitation of coherent and stable equilibrium MgZn2 phase.
Description
Staff publications
Keywords
Magnesium , Alluminum 7249 , Corrosion , Retrogression , Strength , Microstructure , Research Subject Categories::TECHNOLOGY
Citation
Adeosun S.O.; Sekunowo I.O.; Balogun S.A.; Oladoye A.M. and Osoba L.O. (2010). Influence of magnesium addition on the mechanical and corrosion responses of 7249 aluminum alloy. Journal of Corrosion Science and Engineering, 13: 1-11