Abstract
A thermodynamic analysis of the y loop in iron alloys recently published by Zener1 was applied to the ternary phase diagram Fe-Ni-AI. From this analysis two separate parameters, ΔTmartensite and ΔTmartensite were obtained, which describe the influence of the alloying elements upon the magnetic transformation range and a hypothetical martensite temperature, respectively. Extrapolation of the resulting values, plotted against the atomic fraction Ni/(Ni+AI), indicates an anomalous effect of aluminum on the ferromagnetic characteristics of iron. An interpretation of the anomaly is advanced in terms of short range magnetic order above the Curie point.
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ULRICH H. ROESLER, formerly with the Westinghouse Research Laboratories, Pittsburgh
TP 4302E. Manuscript, June 28, 1955. Cleveland Meeting, October 1956.
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Roesler, U.H. Study of Ferrous Ternary Diagrams in Relation to Magnetic Interactions: Fe-Ni-AI System. JOM 8, 1285–1289 (1956). https://doi.org/10.1007/BF03377867
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DOI: https://doi.org/10.1007/BF03377867