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Advances in Materials Science and Engineering
Volume 2009 (2009), Article ID 506024, 9 pages
http://dx.doi.org/10.1155/2009/506024
Research Article

Morphological Investigation of Foamed Aluminum Parts Produced by Melt Gas Injection

1Dipartimento di Ingegneria Meccanica e Gestionale, Politecnico di Bari, viale Japigia 182, 70126 Bari, Italy
2Dipartimento di Ingegneria dell'Ambiente e per lo Sviluppo Sostenibile, Politecnico di Bari, viale del Turismo 8, 74100 Taranto, Italy
3Faculty of Engineering and Architecture, Helsinki University of Technology, Otakaari 4, 02015 Espoo, Finland

Received 26 May 2008; Revised 22 December 2008; Accepted 3 February 2009

Academic Editor: Jack Gillespie

Copyright © 2009 R. Surace et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Porous metal materials are a new class of materials with low densities, large specific surface, and novel physical and mechanical properties. Their applications are extremely varied: for light weight structural components, for filters and electrodes, and for shock or sound absorbing products. Recently, interesting foaming technology developments have proposed metallic foams as a valid commercial chance; foam manufacturing techniques include solid, liquid, or vapor state methods. The foams presented in this study are produced by Melt Gas Injection (MGI) process starting from melt aluminum. The aim of this investigation is to obtain complex foamed aluminum parts in order to make the MGI more flexible. This new method, called MGI-mould process, makes possible to produce 3D-shaped parts with complicated shape or configuration using some moulds obtained by traditional investment casting process.