PSI - Issue 28

Available online at www.sciencedirect.com Structural Int grity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 28 (2020) 2297–2303

© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo The present work investigates the corrosion resistance of the Al-Cu-Li (2198) aluminium alloy in T8; a comparison against Al-Cu (2024) alloy is attempted. Tensile specimens were pre-corroded for different exposure times to 3.5 wt. % NaCl solution and immediately afterwards they were tested in tension. Corrosion exposure was found to degrade all aspects of the tensile behaviour of AA2024-T3 alloy at a higher level compared to the respective degradation of the tensile properties of AA2198-T8 alloy especially at long exposure times where the pitting corrosion mechanism takes place. Regarding the elongation at fracture, AA2024-T3 was found to degrade at much higher rates even at the short exposure times where hydrogen embrittlement is the dominant degradation mechanism. It was thus definitely concluded that Al-Cu-Li alloy is superior concerning corrosion resistance, since it maintains higher percentages of the initial (uncorroded) values of its tensile properties, against AA2024. © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 1 st Virtual European Conference on Fracture Corrosion behaviour of AA2198–T8 and AA2024-T3 alloy in 3.5% aqueous solution Dimitris Georgoulis a , Christina M. Charalampidou a , Nikoleta Siskou, Nikolaos D. Alexopoulos a , ,* , Stavros K. Kourkoulis b a University of the Aegean, School of Engineering, Department of Financial Engineering, 821 32 Chios, Greece b National Technical University of Athens, Department of Mechanics, Laboratory for Testing and Materials, 157 80 Athens, Greece Abstract The present work investigates the corrosion resistance of the Al-Cu-Li (2198) aluminium alloy in T8; a comparison against Al-Cu (2024) alloy is attempted. Tensile specimens were pre-corroded for different exposure times to 3.5 wt. % NaCl solution and immediately afterwards they were tested in tension. Corrosion exposure was found to degrade all aspects of the tensile behaviour of AA2024-T3 alloy at a higher level compared to the respective degradation of the tensile properties of AA2198-T8 alloy especially at long exposure times where the pitting corrosion mechanism takes place. Regarding the elongation at fracture, AA2024-T3 was found to degrade at much higher rates even at the short exposure times where hydrogen embrittlement is the dominant degradation mechanism. It was thus definitely concluded that Al-Cu-Li alloy is superior concerning corrosion resistance, since it maintains higher percentages of the initial (uncorroded) values of its tensile properties, against AA2024. © 2020 The Authors. Published by ELSE IER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 1 st Virtual European Conference on Fracture Corrosion behaviour of AA2198–T8 and AA2024-T3 alloy in 3.5% aqueous solution Dimitris Georgoulis a , Christina M. Charalampidou a , Nikoleta Siskou, Nikolaos D. Alexopoulos a , ,* , Stavros K. Kourkoulis b a University of the Aegean, School of Engineering, Department of Financial Engineering, 821 32 Chios, Greece b National Technical University of Athens, Department of Mechanics, Laboratory for Testing and Materials, 157 80 Athens, Greece Abstract

Keywords: corrosion, aluminium alloys, electrochemical impedance Keywords: corrosion, aluminium alloys, electrochemical impedance

* Corresponding author. Tel.: +30 22710 35464 E-mail address: nalexop@aegean.gr * Corresponding author. Tel.: +30 22710 35464 E-mail address: nalexop@aegean.gr

2452-3216 © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 2452-3216 © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.11.076