Abstract
Outbreaks of interconnected porosity in industrial Al-Si-based alloy castings have, on occasion, been attributed to variations in metal chemistry rather than to changes in process parameters. This work identifies the role that iron plays in porosity formation and reports a threefold effect in an Al-5 pct Si-1 pct Cu-0.5 pct Mg alloy. In addition to a detailed analysis of casting porosity profiles, metallographic and thermal studies also point to inadequacies in the existing theories regarding the role of iron and suggest that a new theory is required to understand the observed behavior.
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Taylor, J.A., Schaffer, G.B. & StJohn, D.H. The role of iron in the formation of porosity in Al-Si-Cu-based casting alloys: Part I. Initial experimental observations. Metall Mater Trans A 30, 1643–1650 (1999). https://doi.org/10.1007/s11661-999-0101-1
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DOI: https://doi.org/10.1007/s11661-999-0101-1