1. Fatigue behavior of AA7075-T6 aluminum alloy coated with ZrN by PVD
- Author
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Puchi-Cabrera, E.S., Staia, M.H., Lesage, J., Gil, L., Villalobos-Gutiérrez, C., La Barbera-Sosa, J., Ochoa-Pérez, E.A., and Le Bourhis, E.
- Subjects
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ALUMINUM alloys , *CORROSION fatigue of metals , *MECHANICAL properties of metals , *SCANNING electron microscopy - Abstract
Abstract: The present investigation has been conducted in order to study the effect of the deposition of a ZrN coating, of ∼3μm in thickness, on the static mechanical properties and fatigue behavior of a 7075-T6 aluminum alloy substrate. It has been determined that the coating deposition process gives rise to a significant decrease in such properties, which is not fully compensated for the presence of the film. When fatigue tests were carried out in a 3wt.% NaCl solution at low alternating stresses, the ZrN film partially compensated for the decrease in fatigue properties of the coated substrate. Extensive delamination of the coating from the substrate was observed under the action of cyclic stresses greater than approximately 220MPa. Below this stress and in the presence of NaCl, the behavior of the coated material approached that of the uncoated alloy, which highlighted the good corrosion resistance of the ZrN coating and its ability to protect the substrate when it remained adhered to the latter. [Copyright &y& Elsevier]
- Published
- 2008
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