Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/23453

TitleUse of acoustic energy in sand casting of aluminium alloys
Author(s)Puga, Hélder
Barbosa, J.
Oliveira, Joana
KeywordsUltrasonic
Casting
Ultrasound
Aluminium alloys
Aluminium Alloy
Issue date2013
PublisherTrans Tech Publications
JournalAdvanced Materials Research
Abstract(s)During the last years, some researchers have focused the development of ultrasonic microstructure refinement /modification techniques of die-casting aluminium alloys, to improve their properties. The developed techniques are highly efficient when applied to the die-casting process, but their capability with sand and ceramic moulding are unknown. Sand/ceramic aluminium castings are prone to coarse microstructure, porosities and inclusions due to low cooling rates and turbulent gravity pouring, and suitable processing techniques are required to eliminate those drawbacks. This article reports some results of a research work aiming the development of a reliable, low-cost and environmentally friend casting process, for geometrically complex and massive high strength sand/ceramic aluminium castings, to eliminate traditional soundness related defects and simultaneously promote the development of refined microstructures. The article presents the effect of applying ultrasound to AlSi9Cu3 alloy during solidification on a sand mould on the resultant microstructure. Results include microstructure characterization and its relationship with thermal analysis data collected from the center of the cast samples during cooling.
TypeConference paper
URIhttp://hdl.handle.net/1822/23453
ISBN9783037856925
DOI10.4028/www.scientific.net/AMR.690-693.2366
ISSN1662-8985
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CIICS - Artigos em revistas de circulação internacional com arbitragem científica

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