GHEA is a CALPHAD Thermodynamic Database
developed by the COMAT Research Group,
Department of Chemistry and Industrial Chemistry (DCCI), University of Genoa

GHEA includes
15 elements (Al, B, C, Co, Cr, Fe, Hf, Mo ,Ni, Re, Si, Ta, Ti, W, Y)
70 binary and 90 ternary fully assessed systems,
200 modelled phases.

GHEA is a CALPHAD thermodynamic database under continuous development, devoted to the calculation of phase equilibria in multicomponent alloy systems, including High Entropy Alloys, Superalloys, and, more generally, multicomponent materials for high-temperature applications.

GHEA is currently able to predict phase equilibria across the entire Al-C-Co-Cr-Fe-Mo-Ni-Ta-W nine-component system, as well as in a series of lower-order systems derived from the 15 elements included in the database.

Binary and ternary systems have been assessed over the full composition range and within the 0–4500 °C temperature interval. A selection of these assessments (often including the corresponding TDB files) is presented on the following pages Binary systems and Ternary systems.

Thermodynamic models for the GHEA phases have been selected primarily on the basis of their crystal structure. The GHEA phase models are reported in the page Phase models.

Development of the database has been supported by key experiments performed by the COMAT group, aimed at improving and validating the calculation results. Indeed, GHEA has already been successfully applied to the prediction and interpretation of experimental investigations involving selected HEAs.

The development of GHEA would not have been possible without the contribution of the GHEA Team