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Experimental and thermodynamic study of the equilibria between ferrite, austenite and intermediate phases in the fe-mo, fe-w, and fe-mo-w systems

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Abstract

The phase equilibria between ferrite and austenite and between ferrite and the intermediateR- andµ-phases have been studied by subjecting high purity alloys of Fe-Mo, Fe-W, and Fe-Mo-W to well controlled heat treatments. The equilibrium compositions at the two-phase interfaces were measured with an electron microprobe. Some of the experimental results show reasonable agreement with previously reported values, but are believed to be of higher accuracy. The new experimental data were, together with available relevant thermodynamic information, evaluated in terms of mathematical models for the individual phases and the parameters thus obtained were then used to calculate the two-phase boundaries in the binary Fe-Mo, Fe-W, and ternary Fe-Mo-W systems. In the course of this study the free energy of formation of theR andµ phases was also evaluated.

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Formerly Assistant Professor, the Division of Physical Metallurgy, Royal Institute of Technology, Stockholm, Sweden.

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Kirchner, G., Harvig, H. & Uhrenius, B. Experimental and thermodynamic study of the equilibria between ferrite, austenite and intermediate phases in the fe-mo, fe-w, and fe-mo-w systems. Metall Trans 4, 1059–1067 (1973). https://doi.org/10.1007/BF02645609

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  • DOI: https://doi.org/10.1007/BF02645609

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