Experimental and theoretical studies of corrosion-induced mechanical properties degradation of aircraft 2024 aluminum alloy

Alexopoulos, ND; Papanikos, P

dc.contributor.author	Alexopoulos, ND	en
dc.contributor.author	Papanikos, P	en
dc.date.accessioned	2014-03-01T01:28:22Z
dc.date.available	2014-03-01T01:28:22Z
dc.date.issued	2008	en
dc.identifier.issn	0921-5093	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18821
dc.subject	2024-T3 alloy	en
dc.subject	Corrosion	en
dc.subject	Finite element analysis	en
dc.subject	Fracture toughness	en
dc.subject	Tensile test	en
dc.subject.classification	Nanoscience & Nanotechnology	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Alloys	en
dc.subject.other	Alumina	en
dc.subject.other	Aluminum alloys	en
dc.subject.other	Cerium alloys	en
dc.subject.other	Corrosion	en
dc.subject.other	Degradation	en
dc.subject.other	Embrittlement	en
dc.subject.other	Finite element method	en
dc.subject.other	Fracture	en
dc.subject.other	Hydrogen	en
dc.subject.other	Hydrogen embrittlement	en
dc.subject.other	Mechanical properties	en
dc.subject.other	Mechanisms	en
dc.subject.other	Tensile testing	en
dc.subject.other	Testing	en
dc.subject.other	Toughness	en
dc.subject.other	2024 aluminum alloys	en
dc.subject.other	2024-t3	en
dc.subject.other	2024-T3 alloy	en
dc.subject.other	Corrosive environments	en
dc.subject.other	Degradation mechanisms	en
dc.subject.other	Effective thicknesses	en
dc.subject.other	Exfoliation corrosions	en
dc.subject.other	Exposure times	en
dc.subject.other	Fast calculations	en
dc.subject.other	Fe models	en
dc.subject.other	Finite element analysis	en
dc.subject.other	Mechanical models	en
dc.subject.other	Small reductions	en
dc.subject.other	Surface cracks	en
dc.subject.other	Tensile	en
dc.subject.other	Tensile mechanical properties	en
dc.subject.other	Tensile test	en
dc.subject.other	Test results	en
dc.subject.other	Test specimens	en
dc.subject.other	Thickness reductions	en
dc.subject.other	Fracture toughness	en
dc.title	Experimental and theoretical studies of corrosion-induced mechanical properties degradation of aircraft 2024 aluminum alloy	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.msea.2008.08.024	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.msea.2008.08.024	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	In the present work, the influence of the corrosion exposure time on the mechanical properties degradation of the aluminum 2024-T3 alloy is studied. Tensile and fracture toughness mechanical tests had been carried out on pre-corroded specimens, exposed for different times to laboratory accelerated, exfoliation corrosion solution. The test results show that both the tensile mechanical properties as well as the fracture toughness exponentially decreased with increasing exposure time. A mechanical model has been devised to calculate the specimen's remaining effective thickness after different corrosion exposure times. It has been shown that the decrease in the alloy's fracture toughness is mainly associated with the thickness reduction degradation mechanism and a small reduction is attributed to hydrogen embrittlement. The hydrogen embrittlement degradation mechanism is saturated for exposure times up to 24 h. For higher exposure times, the prevailing degradation mechanism of alloy's fracture toughness is the formation of corrosion-induced surface cracks and the resulting reduction of the effective thickness of the test specimen. An FE model has been developed for a fast calculation of the uncorroded alloy's fracture toughness with good results. The model has also been exploited to predict the alloy's fracture toughness degradation for the increasing exposure time to Corrosive environment. (C) 2008 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Materials Science and Engineering A	en
dc.identifier.doi	10.1016/j.msea.2008.08.024	en
dc.identifier.isi	ISI:000261420500035	en
dc.identifier.volume	498	en
dc.identifier.issue	1-2	en
dc.identifier.spage	248	en
dc.identifier.epage	257	en