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, ΔT_martensite and ΔT_martensite 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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temperature magnetic transformation range alloying y loop curie point ferromagnetic characteristics of thermodynamic analysis ternary phase diagram

Ulrich H. Roesler,.Study of Ferrous Ternary Diagrams in Relation to Magnetic Interactions: Fe-Ni-AI System. 8 (10),1285–1289.

Ulrich H. Roesler,"Study of Ferrous Ternary Diagrams in Relation to Magnetic Interactions: Fe-Ni-AI System" 8

Ulrich H. Roesler,"Study of Ferrous Ternary Diagrams in Relation to Magnetic Interactions: Fe-Ni-AI System"