Development of Innovative Al–Si–Mn–Mg Alloys with High Mechanical Properties

In modern practice standard materials do not satisfy the rigorous requirements for applications. Paper represents thermodynamic modeling of innovative aluminium alloys with better mechanical properties for high temperature applications. Using different combinations of alloying elements in specific temperature regions the information of which specific phase (solid solution, intermetallic compound) is formed. Alloys systems Al–X–Y (X = Si, Mn, Mg; Y = Zr, Mo) were investigated using thermodynamic equilibrium calculations (ThermoCalc), thermal analysis, and optical and scanning electron microscopy, in order to analyze the corresponding properties. Determination of chemical composition and types of phases, amount of phase and study of equilibrium and non-equilibrium processes, the characteristic solidification temperatures and mechanical properties for laboratory and industrial aluminium alloys was done.