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Type: Conference paper
Title: Factors influencing the modification and refinement of hypereutectic Al-Si alloys for production of automotive pistons
Author: Ghomashchi, R.
Citation: 133rd Annual Meeting & Exhibition of The Minerals, Metals & Materials Society, 2004 / A. T. Tabereaux (ed.), pp.851-855
Publisher: TMS (The Minerals, Metals & Materials Society)
Publisher Place: USA
Issue Date: 2004
Series/Report no.: LIGHT METALS
ISBN: 0873392736
ISSN: 0147-0809
Conference Name: Annual Meeting & Exhibition of The Minerals, Metals & Materials Society (133rd : 2004 : Charlotte, North Carolina, USA)
Editor: Tabereaux, A.T.
Statement of
S. Nafisi, J. Hedjazi, S.M.A. Boutorabi and R. Ghomashchi
Abstract: The effects of refinement and modification of commercial hypereutectic piston alloy (17-19% Si) have been investigated using the thermal analysis technique. Addition of 0.1 %P results in achieving an optimum refined microstructure. The results show that variations in silicon nucleation and liquidus temperatures and freezing range are the best parameters to indicate Si-refinement. With adding of Sr to the P refined alloy, primary silicon particles become larger with less uniform distribution. Furthermore Sr-addition changes the morphology of blocky primary silicon in to dendrites. The results show that with addition of Sr, nucleation sites for silicon particles decreased.
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Appears in Collections:Aurora harvest 4
Mechanical Engineering conference papers

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