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High Entropy Alloys Databases

TCHEA9 is our thermodynamic and properties database designed for use with High Entropy Alloys (HEAs), also known as Multi-principal Element Alloys (MPEA). MOBHEA4 is the corresponding mobility database needed for use with the add-on kinetic modules.

Technical Information Sheet for TCHEA9

Technical Information Sheet for MOBHEA4

Validation and Calculation Examples for TCHEA9

Molecular mesh 3D - general research microstructure, HEA

TCHEA9 Quick Overview

  • PROPERTIES:
    • Gibbs Energy
      • Volume
        • Surface tension of liquid
          • Viscosity of liquid
            • Electrical resistivity
              • Thermal conductivity
                • Elastic constants1
                • ELEMENTS: Al, B, C, Co, Cr, Cu, Fe, Hf, Ir, Mn, Mo, N, Nb, Ni, O, Re, Rh, Ru, Si, Sn, Ta, Ti, V, W, Y, Zn, Zr
                • ASSESSED PHASES: 730

TCHEA9 for Thermodynamic and Properties Data

TCHEA9 is a thermodynamic and properties database for High Entropy Alloys, commonly known as HEAs. HEAs are a new class of materials consisting of more than one principal element in a multicomponent system.

The coupling of our CALPHAD-based computational tools and databases allows for a high-fidelity calculation of thermodynamic properties and phase equilibria in multicomponent HEAs, thus shedding light on the formation mechanism and thermodynamic and kinetic stability of HEAs. This provides an efficient way to design HEAs for desired materials properties based on the prediction of microstructures through process optimization.

TCHEA9 was developed to be used with our entire suite of products: Thermo-Calc, the Add-on Modules, and all available SDKs.

MOBHEA4 for Kinetic Data

MOBHEA4 is a corresponding mobility database that provides kinetic data for those working with the add-on kinetic modules – the Diffusion Module (DICTRA) and the Precipitation Module (TC-PRISMA) – as well as a few specific calculation types, such as Scheil with back diffusion. If you do not purchase a license for an add-on kinetic module, you most likely do not need a mobility database. One of our technical sales representatives can help you determine whether your work requires a mobility database.

MOBHEA4 is compatible and recommended to be used in combination with TCHEA9.

Highlights of the Latest Release

The latest version of our High Entropy Alloys Thermodynamic and Properties Database, TCHEA9, was released with Thermo-Calc 2026b, in June 2026. Read the Release Notes for more details.

  • Significant improvements to the Heusler Phase
    • Remodelled the Heusler phase
      • DFT-calculated formation energy is applied for all the end-members
      • 17 new phases (730 total)
      • 86 new ternary systems assessed (729 total)
      • 49 binaries updated, particularly to improve full temperature range
      • 167 ternaries updated with new phases, improved ternary solubility, and stability
      • Updates to thermal conductivity and electrical resistivity of B

1: Elastic properties are only available for cubic BCC (A2 and B2), cubic FCC (A1 and L12), and hexagonal HCP (A3) phases.

Exploring chemistry and additive manufacturing design spaces: a perspective on computationally-guided design of printable alloys

High-Throughput Exploration of Refractory Superalloys with Experimental Verification

Navigating the BCC-B2 refractory alloy space: Stability and thermal processing with Ru-B2 precipitates

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