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https://hdl.handle.net/1822/26066
Título: | The effect of Sc additions on the microstructure and age hardening behaviour of as cast Al–Sc alloys |
Autor(es): | Costa, Sónia Puga, Hélder Barbosa, J. Pinto, A. M. P. |
Palavras-chave: | Aluminium alloys Grain refinement Precipitation strengthening |
Data: | 2012 |
Editora: | Elsevier Science |
Revista: | Materials and Design |
Citação: | Materials and Design 42 (2012) 347–352 |
Resumo(s): | The grain refinement effect and the ageing behaviour of Al–0.5 wt.% Sc, Al–0.7 wt.% Sc, and Al–1 wt.% Sc alloys are studied on the basis of optic microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD) observations and hardness measurements. In Al–Sc alloys the higher grain refinement is observed for Sc contents greater than 0.5 wt.% accompanied by a notorious morphology modification, from coarse columnar grains to a fine perfect equiaxed structure. The as cast structures are characterized by a rich supersaturated solid solution in Sc, that promotes a great age hardening response at 250 C and 300 C. The age hardening curves also demonstrate a low overageing kinetics for all the alloys. Although the higher Sc content in solid solution for the alloys with 0.7 and 1 wt.% Sc, the age hardening response of all the Al–Sc alloys remains similar. The direct age hardening response of the as cast Al–0.5 wt.% Sc is shown to be greater than the solutionised and age hardened alloy. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/26066 |
DOI: | 10.1016/j.matdes.2012.06.019 |
ISSN: | 0261-3069 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CIICS - Artigos em revistas de circulação internacional com arbitragem científica CT2M - Artigos em revistas de circulação internacional com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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The effect of Sc additions on the microstructure.pdf | Documento principal | 1,16 MB | Adobe PDF | Ver/Abrir |