Abstract
Differential thermal analysis has been employed to achieve an accurate determination of the solidliquid equilibria for γ-Fe at temperatures between 1147 °C and 1430 °C and compositions in the range 1.5 to 4.42 wt pct C. Several small but significant changes to the established phase diagram have been proposed. In particular, the liquidus in the vicinity of the eutectic has been raised by approximately 15 °C and the temperature of the graphite eutectic lowered to 1150.5 °C. Consequently, the eutectic compositions have been increased to 4.39 and 4.42 wt pct C for the graphite and cementite eutectics, respectively. The possibility of some modification to the γ-solidus has also been suggested, and a revised phase diagram is presented.
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Chicco, B., Thorpe, W.R. Experimental Determination of the Austenite + Liquid Phase Boundaries of the Fe-C System. Metall Trans A 13, 1293–1297 (1982). https://doi.org/10.1007/BF02645513
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DOI: https://doi.org/10.1007/BF02645513