Abstract
Phase compositions of B‐Fe‐Mn‐V alloys were studied by several experimental methods (DTA measurement, X‐ray diffractions, and scanning electron microscopy). Besides the experimental study of the quaternary system, thermodynamic modelling of the ternary B‐Mn‐V system by the Calphad method and thermodynamic calculations for the quaternary B‐Fe‐Mn‐V system were performed. Calculations for the quaternary system are based on the ternary subsystems (B‐Mn‐V, B‐Fe‐V, B‐Fe‐Mn, and Fe‐Mn‐V). Boron is modelled as an interstitial element in all solid solutions of vanadium, manganese, and iron. Very good agreement between experimental results and thermodynamic calculations was achieved. The created thermodynamic database is suitable for thermodynamic calculations of phase diagrams for all the ternary subsystems and also for the B‐Fe‐Mn‐V quaternary system.
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