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Corrosion-fatigue lifetime of Aluminium–Copper–Lithium alloy 2050 in chloride solution

Guérin, Mathilde and Alexis, Joël and Andrieu, Eric and Blanc, Christine and Odemer, Grégory Corrosion-fatigue lifetime of Aluminium–Copper–Lithium alloy 2050 in chloride solution. (2015) Materials and Design, 87. 681-692. ISSN 0261-3069

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Official URL: http://dx.doi.org/10.1016/j.matdes.2015.08.003


The fatigue behaviour of Aluminium–Copper–Lithium 2050 alloy under two metallurgical states (T34 and T84) was studied in air for healthy and pre-corroded samples in a 0.7 NaCl solution. The results were compared to those obtained during fatigue–corrosion tests performed in a similar chloride medium. Preliminary corrosion tests demonstrated that the T34 metallurgical state was susceptible to intergranular corrosion, while the T84 metallurgical state was susceptible to intragranular corrosion. Fatigue life tests in air on pre-corroded samples revealed a significant decrease in fatigue life related to the presence of corrosion defects before the cyclic solicitation. A strong effect of the first minutes of immersion in corrosive media was evidenced on fatigue life behaviour. The fatigue–corrosion tests revealed that the T34 metallurgical state was more affected by fatigue–corrosion in terms of fatigue life than the T84 metallurgical state. This observation can be explained by the increased propagation of intergranular corrosion enhanced by the cyclic solicitation.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Materials and Design website : http://www.sciencedirect.com/science/article/pii/S0264127515302525
HAL Id:hal-01264391
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Deposited On:25 Jan 2016 11:01

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