Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/26067
Título: | Use of acoustic energy in the processing of molten aluminium alloys |
Autor(es): | Puga, Hélder Costa, S. Barbosa, J. Pinto, A. M.P. Ribeiro, S. |
Palavras-chave: | Aluminium Ultrasonic Mechanical properties Ultrasound Refining Grain refinement Processing Aluminium Alloys |
Data: | 2013 |
Editora: | Trans Tech Publications |
Revista: | Materials Science Forum |
Resumo(s): | During the last years aluminium alloys have been gaining increased acceptance as structural materials in the automotive and aeronautical industries, mainly due to their light weight, good formability and corrosion resistance. However, improvement of mechanical properties is a constant in research activities, either by the development of new alloys or by microstructure manipulation. This presentation focuses a novel effective dynamic methodology to perform microstructural refinement / modification and degassing of light alloys, namely aluminium alloys, by applying acoustic energy to the melts. High intensity acoustic energy significantly improves the microstructure, therefore the mechanical properties of those alloys, avoiding the use of traditional chemically based degassing and refining techniques which are less effective and present significant environmental impact. Ultrasonic (US) vibration has proven to be extremely effective in degassing, controlling columnar dendritic structure, reducing the size of equiaxed grains and, under some conditions, producing globular grains and modifying the eutectic silicon cells in Al-Si alloys. The mechanisms of US processing of aluminium melts are discussed and experimental results on this field are presented. |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/26067 |
ISBN: | 978-3-03785-493-8 |
DOI: | 10.4028/www.scientific.net/MSF.730-732.895 |
ISSN: | 0255-5476 |
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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Use of Acoustic Energy in the Processing of Molten Aluminium Alloys.pdf | Documento principal | 582,61 kB | Adobe PDF | Ver/Abrir |