Effects of substituting ytterbium for scandium on the microstructure and age-hardening behaviour of Al–Sc alloy

Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/34523

Título:	Effects of substituting ytterbium for scandium on the microstructure and age-hardening behaviour of Al–Sc alloy
Autor(es):	Tuan, N. Q. Pinto, A. M. P. Puga, Hélder Rocha, L. A. Barbosa, J.
Palavras-chave:	Aluminium–scandium alloys Ytterbium Age-hardening Precipitate coarsening TEM High-resolution TEM
Data:	2014
Editora:	Elsevier 1
Revista:	Materials Science & Engineering: A
Resumo(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.
Tipo:	Artigo
URI:	https://hdl.handle.net/1822/34523
DOI:	10.1016/j.msea.2014.02.042
ISSN:	0921-5093
Versão da editora:	www.elsevier.com/locate/msea
Arbitragem científica:	yes
Acesso:	Acesso aberto
Aparece nas coleções:	CIICS - Artigos em revistas de circulação internacional com arbitragem científica