Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/34523

TitleEffects of substituting ytterbium for scandium on the microstructure and age-hardening behaviour of Al–Sc alloy
Author(s)Tuan, N. Q.
Pinto, A. M. P.
Puga, Hélder
Rocha, L. A.
Barbosa, J.
KeywordsAluminium–scandium alloys
Ytterbium
Age-hardening
Precipitate coarsening
TEM
High-resolution TEM
Issue date2014
PublisherElsevier
JournalMaterials Science & Engineering: A
Abstract(s)In order to reduce the cost of Al–Sc alloys and maintain their mechanical properties, the microstructure and mechanical properties of Al–0.24 wt% Sc–0.07 wt% Yb in comparison with Al–0.28 wt% Sc alloys were studied. The aging behaviour, precipitate morphologies, precipitate coarsening and precipitation hardening of both alloys were investigated. The average diameter and the size distribution of nanoscale Al3Sc and Al3(Sc,Yb) precipitates at various aging conditions were measured. Transmission electron microscopy (TEM) and high-resolution TEM were used to deeply understand the precipitate evolution. A maximum hardness around 73 (HV30) was obtained with a precipitate diameter from 4.3 to 5.6 nm for both alloys.
Typearticle
URIhttp://hdl.handle.net/1822/34523
DOI10.1016/j.msea.2014.02.042
ISSN0921-5093
Publisher versionwww.elsevier.com/locate/msea
Peer-Reviewedyes
AccessopenAccess
Appears in Collections:CIICS - Artigos em revistas de circulação internacional com arbitragem científica


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