Effect of artificial aging on the mechanical properties of an aerospace aluminum alloy 2024

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dc.contributor.authorReis D.A.P.
dc.contributor.authorCouto A.A.
dc.contributor.authorDomingues N.I.
dc.contributor.authorHirschmann A.C.O.
dc.contributor.authorZepka S.
dc.contributor.authorMoura Neto C.
dc.date.accessioned2024-03-13T01:09:20Z
dc.date.available2024-03-13T01:09:20Z
dc.date.issued2012
dc.description.abstractAluminum alloys have low specific weight, relatively high strength and high corrosion resistance and are used in many applications. Aluminum Alloy 2024 is widely used for aircraft fuselage structures, owing to its mechanical properties. In this investigation, Aluminum Alloy 2024 was given solid solution treatments at 495, 505, and 515°C followed by quenching in water. It was then artificially aged at 190 and 208°C. Subsequently, hardness measurements, tensile tests as well as impact and fatigue tests were carried out on the heat treated alloys to determine the mechanical properties. The tensile and hardness tests revealed similar mechanical properties for specimens of this alloy that were given the three solid solution treatments. Aluminum Alloy 2024 specimens that were solid solution treated at 515°C and artificially aged at 208°C for 2h exhibited the highest yield and tensile strength. In general, the increase in strength was accompanied by a decrease in ductility. Cyclic fatigue studies were conducted with symmetric tension-compression stresses at room temperature, using a bending-rotation test machine. The alloy solution heat treated at 515°C and aged at 208°C/2h was fatigue tested at constant frequency. The relation between stress amplitude and cycles to failure was established, enabling the fatigue strength to be predicted at more than 7.8×106 cycles, with maximum stress of 110.23 MPa. The fracture surfaces of specimens that failed after fewer cycles showed mainly precipitates and micro voids, whereas specimens that fractured after a higher number of cycles indicated that cracks initiated at the surface. The high cycle fatigue fracture surfaces revealed pores that could be due to precipitates from the matrix. © (2012) Trans Tech Publications.
dc.description.firstpage193
dc.description.lastpage198
dc.description.volume326-328
dc.identifier.doi10.4028/www.scientific.net/DDF.326-328.193
dc.identifier.issn1662-9507
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/36879
dc.relation.ispartofDefect and Diffusion Forum
dc.rightsAcesso Restrito
dc.subject.otherlanguageAA2024
dc.subject.otherlanguageAerospace
dc.subject.otherlanguageAging
dc.subject.otherlanguageAluminum alloys
dc.subject.otherlanguagePrecipitation
dc.titleEffect of artificial aging on the mechanical properties of an aerospace aluminum alloy 2024
dc.typeArtigo de evento
local.scopus.citations27
local.scopus.eid2-s2.0-84860792526
local.scopus.subjectAa2024
local.scopus.subjectAerospace
local.scopus.subjectAerospace aluminum alloys
local.scopus.subjectAircraft fuselages
local.scopus.subjectAlloy 2024
local.scopus.subjectArtificial ageing
local.scopus.subjectFuselage structures
local.scopus.subjectHardness measurement
local.scopus.subjectHigh-strength
local.scopus.subjectSolid solution treatment
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84860792526&origin=inward
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