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Published in:
2016 | OriginalPaper | Chapter
Influence of the Chemical Composition on the Ductility of an AlSiCuZnFe Recycling foundry Alloy
Authors : P. Pucher, H. Böttcher, H. Kaufmann, H. Antrekowitsch, P. J. Uggowitzer
Published in: Light Metals 2014
Publisher: Springer International Publishing
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The secondary foundry alloy of the type AlSiCuZnFe is one of the most common materials for several applications, mainly in the automotive industry. The main alloy within the AlSiCuZnFe family is the foundry alloy A226 (AlSi9Cu3(Fe)), which is a recycling alloy. The relatively low ductility of Af < 3 % is not sufficient for various applications leading to a limited applicability of the A226. This study focuses on the investigation of the systematic compositional variations within and outside of the alloy’s tolerance band and illustrates the achievable values for the elongation to fracture. It can be shown, that yield strength of permanent mold cast samples ranges from 80 MPa to 200 MPa, while elongation varies between 1 % and > 12 % in the as-cast state, just by varying the alloying elements. This microstructureproperty relationship is interpreted in the light of thermodynamic calculations and metallographic investigations.