Accelerated corrosion exposure in ultra thin sheets of 2024 aircraft aluminium alloy for GLARE applications

Alexopoulos, ND; Dalakouras, CJ; Skarvelis, P; Kourkoulis, SK

dc.contributor.author	Alexopoulos, ND	en
dc.contributor.author	Dalakouras, CJ	en
dc.contributor.author	Skarvelis, P	en
dc.contributor.author	Kourkoulis, SK	en
dc.date.accessioned	2014-03-01T02:07:34Z
dc.date.available	2014-03-01T02:07:34Z
dc.date.issued	2012	en
dc.identifier.issn	0010938X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29579
dc.subject	A. Aluminium alloys	en
dc.subject	B. SEM	en
dc.subject	C. Exfoliation corrosion	en
dc.subject	C. Hardening	en
dc.subject	C. Hydrogen embrittlement	en
dc.subject	C. Pitting corrosion	en
dc.subject.other	2024-T3 aluminium	en
dc.subject.other	Accelerated corrosion	en
dc.subject.other	Aircraft aluminium	en
dc.subject.other	Corrosion degradation	en
dc.subject.other	Corrosion products	en
dc.subject.other	Crevice corrosion	en
dc.subject.other	Double exposure	en
dc.subject.other	Double sided	en
dc.subject.other	Ductile-to-brittle transition	en
dc.subject.other	Exfoliation corrosion	en
dc.subject.other	Exposure time	en
dc.subject.other	Hydrogen diffusion	en
dc.subject.other	Microstructural analysis	en
dc.subject.other	Quasi cleavage fracture	en
dc.subject.other	Sheet rolling	en
dc.subject.other	Sub-surfaces	en
dc.subject.other	Surface deterioration	en
dc.subject.other	Tensile fracture surfaces	en
dc.subject.other	Tensile fractures	en
dc.subject.other	Tensile properties degradation	en
dc.subject.other	Tensile specimens	en
dc.subject.other	Transverse rolling	en
dc.subject.other	Ultra-thin	en
dc.subject.other	Aluminum	en
dc.subject.other	Aluminum corrosion	en
dc.subject.other	Brittle fracture	en
dc.subject.other	Degradation	en
dc.subject.other	Ductile fracture	en
dc.subject.other	Ductility	en
dc.subject.other	Hydrogen	en
dc.subject.other	Hydrogen embrittlement	en
dc.subject.other	Pitting	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Tensile strength	en
dc.subject.other	Aluminum alloys	en
dc.title	Accelerated corrosion exposure in ultra thin sheets of 2024 aircraft aluminium alloy for GLARE applications	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.corsci.2011.10.032	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.corsci.2011.10.032	en
heal.publicationDate	2012	en
heal.abstract	The effect of corrosion exposure on ultra thin (t< 0.4. mm) 2024-T3 aluminium sheet thickness is investigated. Microstructural analysis showed that for low accelerated corrosion exposure times, no surface deterioration existed and hence corresponding mechanical properties degradation was assumed to be incited by hydrogen diffusion and subsequent embrittlement. Medium exposure times resulted in cross-section reduction due to formation of sub-surface corrosion products, while crevice corrosion was evident for higher exposure times. Tensile specimens were pre-corroded for single or double sides and then mechanically tested. Decrease in mechanical properties was noticed for both L and T sheet rolling directions, even after a few minutes exposure, with transverse rolling direction having higher degradation values for same exposure times. It was noticed that a single sided corroded specimen needs approximately double exposure time to reach the same ductility decrease of a double sided specimen. Quantitative tensile properties degradation results are discussed; the results were correlated to observed corrosion degradation mechanisms. The stepwise ductile-to-brittle transition of tensile fracture mechanism with increasing corrosion exposure time was denoted via analysis of the 'un-corroded' region of tensile fracture surface. Single sided specimens exhibited quasi-cleavage fracture surfaces at the region below protected surface to corrosion. © 2011 Elsevier Ltd.	en
heal.journalName	Corrosion Science	en
dc.identifier.doi	10.1016/j.corsci.2011.10.032	en
dc.identifier.volume	55	en
dc.identifier.spage	289	en
dc.identifier.epage	300	en