PSI - Issue 10

N. Siskou et al. / Procedia Structural Integrity 10 (2018) 79–84 N. Siskou et al. / Structural Integrity Procedia 00 (2018) 000 – 000

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5. Concluding remarks

The effect of corrosion exposure on the tensile mechanical behaviour of AA2024 in two different conditions, T3 and peak-ageing respectively, was investigated. It was concluded that corrosion degrades all aspects of the tensile behaviour of the AA2024 alloy at a much higher level in T3 condition, when compared to the respective degradation in the peak-ageing condition. The artificial ageing heat treatment in the PA condition seems to impede the corrosion induced degradation that it may be attributed to the precipitation hardening mechanism and the formation of second phase precipitations. Alexopoulos, N.D., Papanikos, P., 2008. Experimental and theoretical studies of corrosion-induced mechanical properties degradation of aircraft 2024 aluminum alloy. Materials Science and Engineering A 498, 248-257. Alexopoulos, N.D., Velonaki, Z., Stergiou, C.I., Kourkoulis, S.K., 2016. The effect of artificial ageing heat treatments on the corrosion-induced hydrogen embrittlement of 2024 (Al – Cu) aluminium alloy. Corrosion Science 102, 413-424. Bagaryatsky, Y.A., 1952. Structural changes on aging Al-Cu-Mg alloys, Dokl. Akad.SSSR 87, 397-559. Boag, A., Taylor, R.J., Muster, T.H., Goodman, N., McCulloch, D., Ryan, C., Rout, B., Jamieson, D., Hughes, A.E., 2010. Stable pit formation on AA2024-T3 in a NaCl environment, Corrosion Science 52, 90-103. Buchheit, R.G., Grant, R.P., Hlava, P.F., Mckenzie, B., Zender, G.L., 1997. Local dissolution phenomena associated with S phase (Al2CuMg) particles in aluminum alloy 2024-T3. Journal of the Electrochemical Society 144, 2621-2628. Davis, J.R., 1999. Corrosion of Aluminum and Aluminum Alloys, ASM International, Materials Park, United States. Hughes, A.E., Muster, T.H., Boag, A., Glenn, A.M., Luo, C., Zhou, X., Thompson, G.E., McCulloch, D., 2010. Co-operative corrosion phenomena. Corrosion Science 52, 665-668. Ilevbare, G.O., Schneider, O., Kelly, R.G., Scully, J.R., 2004. In-situ confocal laser scanning microscopy of AA2024-T3 corrosion metrology: 1. localized corrosion of particles. Journal of the Electrochemical Society 151, B453-B464. Luo, C., Zhou, Z., Thompson, G.E., Hughes, A.E., 2012. Observations of intergranular corrosion in AA2024-T351: the influence of grain stored energy. Corrosion Science 61, 35-44. Ralston, K.D., Birbilis, N., Weyland, M., Hutchinson, C.R., 2010. The effect of precipitate size on the yield strength-pitting corrosion correlation in Al-Cu-Mg alloys. Acta Materialia 58, 5941-5948. Ringer, S.P., Caraher, S.K., Polmear, I.J., 1998. Response to comments on cluster hardening in an aged Al-Cu-Mg alloy. Scripta Materiallia 39, 1559-1567. Ringer, S.P., Hono, K., Polmear, I.J., Sakurai, T., 1996. Nucleation of precipitates in aged Al-Cu-Mg-(Ag) alloys with high Cu:Mg ratios. Acta Materialia 44, 1883-1898. References