Abstract
In this paper, the influence of phosphorus on the formation and presence of microporosity in gray cast iron is examined. The microporosity is ascribed to the formation and presence of the phosphide eutectic(s) in the microstructure during solidification. Samples with high phosphorus content have higher levels of microporosity. The role of alloying elements like chromium and molybdenum on the formation and presence of the phosphide eutectic in the microstructure and overall microporosity is examined. The influence of pouring temperature in controlling the formation of the phosphide eutectic is highlighted. Since cast irons have great use in cylinder liners for automotive applications the practical relevance of using phosphorus is of significant interest.
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