The Influence of Manganese on Phase Formation in the Al-Fe-Si System

Using the Thermo-Calc software package (version TCW8, TTAL 8.2 database), the Al-Fe-Si phase diagram was analyzed. A polythermal section of the Al-Fe-Si system with the addition of manganese as an alloying component was constructed and analyzed. Using composition curves, the optimal manganese concentration required for the formation of the a (Al8Fe2Si) and aMn (Al15Si2Mn4) phases was determined. Also, using cooling curves, the boundaries of the appearance of primary crystals of Fe-containing phases were determined. Based on the results obtained, the possibility of assessing the efficiency of alloying the Al-Fe-Si system alloy with manganese is shown. Simulation results in the Thermo-Calc software package (version TCW8, database TTAL8.2) make it possible to predict phase transformation temperatures with great accuracy and thereby prescribe the optimal heat treatment regime. From a practical point of view, the complex of proposed studies will make it possible to scientifically substantiate and develop new technologies for the production and processing of semi-finished and finished products from aluminum-based alloys and functional materials with a given structure.