Magnesium-based alloys

Our CALPHAD based software and databases allow very accurate calculations of phase equilibria in multicomponent Mg-based alloy systems and provide an efficient way to design and optimise materials chemistry and processing for obtaining desired microstructure and properties.

By using Thermo-Calc and compatible thermodynamic databases, a vast amount of information can be obtained of relevance for multicomponent Mg-based alloys.

Examples of equilibrium properties that can be predicted include:

  • Phase amount and constitution as a function of composition
  • Phase amount and constitution as a function of temperature
  • Liquidus, solidus  and other phase transformation temperatures
  • Solubility of alloy elements in Mg
  • Partitioning of alloying elements among different phases
  • Enthalpy, heat capacity, driving force for phase nucleation and growth

During casting, welding and joining of Mg alloys, the solidification of the alloys happens almost entirely in a non-equilibrium way. The non-equilibrium solidification path can be predicted rather accurately by using the Scheil-Gulliver module available in Thermo-Calc.

From a multicomponent Scheil-Gulliver calculation, one can obtain:

  • Solidification temperature range
  • Incipient melting point
  • Phase amount and its composition
  • Phase formation sequence
  • Micro-segregation of solute elements
  • Latent heat evolution