Thermodynamic assessment of the quaternary system Al–Fe–Mn–Si in the Al-rich corner

A thermodynamic optimisation of the Al-rich corner of the quaternary system Al–Fe–Mn–Si was carried out by the CALPHAD method. The system was described on the basis of the experimental data available in the literature in the concentration range up to 3.0 wt% Fe, 4.0 wt% Mn and 14.0 wt% Si. For the description of the α-Al(FeMn)Si quaternary intermetallic phase, the stoichiometric formula Al16Fe1.7Mn2.3Si3was selected in accordance with available experimental data. All phases of the ternary subsystems were taken into account. The ternary compounds were described without quaternary solubilities. The calculated system shows a good agreement with the experimental data. The investigation was carried out in view of the semi-solid processing of aluminum alloys.