Preliminary Results on the Effects of Modification during Semi-Solid Processing of Al-7%Si Alloys
Date
2005
Authors
Nafisi, S.
Ghomashchi, R.
Langlais, J.
Editors
Kvande, H.
Advisors
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Conference paper
Citation
Light metals 2005 : proceedings of the technical sessions presented by the TMS Aluminum Committee at the 134th TMS Annual meeting, San Francisco, California, February 13-17th, 2005 / H. Kvande (ed.): pp.1083-1088
Statement of Responsibility
Sh. Nafisi, R. Ghomashchi, and J. Langlais
Conference Name
Minerals, Metals and Materials Society Meeting (134th : 2005 : San Francisco, California, U.S.A.)
Abstract
Silicon is one of the most important alloying elements incorporated in Al-alloys. Its addition is to improve castability, fluidity, reduce shrinkage and renders superior mechanical properties. The morphology of silicon however plays an important role on the properties of finished products. Therefore, the usual practice is to modify the as-cast flake or acicular silicon morphology employing special heat treatment or addition of certain modifiers. As a result, the silicon morphology changes to fibrous form with enhanced mechanical properties of the as-cast parts. For conventional casting, this treatment has been investigated widely by so many researchers but in the SSM processing, few published papers could be found. In this article, the addition of Sr as a modifier for Al-Si binary alloy is investigated for semi-solid alloy using the patented SEED process, "Swirled Enthalpy Equilibration Device".
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