Reevaluation of the Fe-Mn Phase Diagram

New results for the enthalpy of mixing of liquid Fe-Mn alloys, the enthalpy of formation of (gamma)-Fe-Mn solid solutions and the heat capacity of (gamma)-Fe-Mn and (gamma)-Fe-Mn alloys obtained by isoperibolic calorimetry and differential thermal analysis (DTA) measurements have been used for the reassessment of the molar Gibbs energy of the various phases of the Fe-Mn system. Experimental information about martensitic transformation temperatures in Fe-Mn alloys published recently was incorporated in the updating of the occurring metastable equilibria. The present reevaluation results in a good fit with all available experimental data and is compared with the results of previous assessments.