The aim of this paper is to assess the role of Sr modification on eutectic Si, Fe-rich intermetallic phases and porosity and their responses to the mechanical properties of a commercial high pressure die cast alloy Al-Si-Cu-Mg with Fe level up to 1%. Tensile test samples with a variety of coarsenesses, containing different Sr levels were cast using the gradient solidification technique, that enables a study of the solely influence of Sr on micro structure and tensile properties. The modification altered the morphology and size of eutectic silicon, while did not make a significant change on morphology of Fe-rich intermetallic and volume fraction distribution of porosity. The tensile test results indicate that eutectic Si modification is not a guarantee for improved mechanical properties due to the presence of a variety of intermetallics that tend to have a larger role on initiating and propagating cracks leading to premature failures in these commercial alloys.
CITATION STYLE
Zamani, M., Seifeddine, S., & Aziziderouei, M. (2016). The role of Sr on microstructure formation and mechanical properties of Al-Si-Cu-Mg cast alloy. In Minerals, Metals and Materials Series (Vol. 0, pp. 297–302). Springer International Publishing. https://doi.org/10.1007/978-3-319-65136-1_51
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