Solidification of cast iron alloys brings about volumetric changes. This article describes direct measurements of volume changes with an illustration of the analysis of volumetric changes during solidification of cast iron with the use of a specially designed riser combined with a furnace. It provides a discussion on the dilatometer analysis that is generally used to measure linear displacement as a function of temperature for all types of materials, and the problems associated with volume-change measurements. The article presents a graphical representation of a consequence of the anisotropy, where the calculated volume change is illustrated as a function of temperature. It concludes with a review of kinetic of graphite expansion.
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