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Dendritic solidification microstructure affecting mechanical and corrosion properties of a Zn4Al alloy

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Abstract

In the present article some important trends have been shown regarding the relationship between solidification variables, microstructure, mechanical and corrosion properties of Zn-4 wt%Al alloy castings. The aim of the present work is to investigate the influence of heat transfer solidification variables on the microstructure of Zn-4 wt%Al castings and to develop correlations with mechanical and corrosion properties. Experimental results include transient metal/mould heat transfer coefficient (h i ), secondary dendrite arm spacings (λ2), corrosion potential (ECorr), corrosion rate (iCorr), ultimate tensile strength (σ u ) and yield strength (σ y ) as a function of solidification conditions imposed by the metal/mould system. It was found that a structural dendritic refinement provides both higher corrosion resistance and better mechanical properties for a hypoeutectic Zn4Al alloy.

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Authors and Affiliations

  1. Department of Materials Engineering, State University of Campinas, UNICAMP, P.O. Box 6122, 13083-970, Campinas, SP, Brazil

    Wislei Riuper Osório, Célia Marina A. Freire & Amauri Garcia

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  1. Wislei Riuper Osório
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  2. Célia Marina A. Freire
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  3. Amauri Garcia
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Correspondence to Amauri Garcia.

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Osório, W.R., Freire, C.M.A. & Garcia, A. Dendritic solidification microstructure affecting mechanical and corrosion properties of a Zn4Al alloy. J Mater Sci 40, 4493–4499 (2005). https://doi.org/10.1007/s10853-005-0852-z

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  • DOI: https://doi.org/10.1007/s10853-005-0852-z

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