APPLICATIONS OF THERMO-CALC

Magnesium

Thermo-Calc can be used to predict thermophysical and phase-based properties and simulate material behavior for magnesium alloys including the Mg-Al based alloys, Mg-Zn-Zr alloys, Mg-RE (rare earth)-Zn alloys, and Mg-RE-Zr alloys.

Solutions for Magnesium

There are a large number of commercial magnesium alloys of industrial relevance, including the Mg-Al based alloys such as AZ, AE, AJ, AM, AS, and AX; Mg-Zn-Zr alloys such as ZK60; Mg-RE (rare earth)-Zn (EZ) alloys; and Mg-RE-Zr alloys such as WE.

Handbook data typically covers only the most common alloys, and additionally does not always take into account variations in chemistry or processing conditions. Where this data is missing, Thermo-Calc can be used to generate the materials property data and make predictions of material behavior throughout the materials life cycle.

Calculate the following based on your actual alloy chemistry:

  • Thermophysical properties, such as:
    • Specific heat, enthalpy, latent heat, density as a function of temperature, coefficients of thermal expansion, and more
    • Phase-based properties, such as:
      • Critical transformation temperatures such as solvus temperatures of precipitates, amounts and compositions of phases, solubility limits, activities, phase diagrams, and more
      • Equilibrium and non-equilibrium solidification, such as:
        • Liquidus, solidus, incipient melt temperatures, freezing range, fraction solid curves, solidification path, fraction eutectic, microsegregation, partition coefficients, latent heat, shrinkage, and more
        • Homogenization:
          • Optimal homogenization temperatures, time needed to homogenize any chemical segregation arising from solidification, and/or dissolve precipitates
          • Precipitation hardening:
            • Concurrent nucleation, growth/dissolution, coarsening of precipitate phases, volume fraction, and size distribution as a function of time

Application Examples

Thermo-Calc has many applications to Mg-based alloys. Below is one such example.

Predicting Secondary Phases Formed during Casting of AZ91

AZ91 is a series of the most important die casting Mg alloys. The typical microstructures of the solidified AZ91 alloys usually consist of (Mg) grains and mainly the Al12Mg17 phase at the grain boundaries [Kabirian and Mahmudi, Metall Mater Trans A 40, 2190–2201 (2009) and Wang et al, Acta Mater. 54, 689–699 (2006)]. Similar microstructures are observed in other AZ series alloys [Wu et al, Trans. Nonferrous Met. Soc. China. 21, 784–789 (2011)].

The Scheil Solidification Simulation Calculator in Thermo-Calc can predict the phases formed during solidification under both rapid cooling (non-equilibrium) and slow cooling (equilibrium) conditions. The figure shows the total fraction of all solid phases as a function of temperature for AZ91, where the solid line corresponds to the non-equilibrium Scheil calculation and the dashed line to equilibrium. As can be seen, the calculation predicts the formation of three Al-Mn compounds, Al8Mn5, Al11Mn4, and Al4Mn, in addition to the experimentally observed phases, hcp_A3-(Mg) and Al12Mg17.

A plot showing the total fraction of all solid phases as a function of temperature for AZ91, calculated using the Scheil calculator in Thermo-Calc.

Learn more about Applications to Mg-based Alloys

A new magnesium sheet alloy with high tensile properties and room-temperature formability

Read now

Let Us Help You

Find the Right Products