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, in general, multicomponent materials for high temperature applications. Peculiar applications of GHEA may go from the interpretaion of experimental results to the development of new materials.

At present GHEA is able to predict phase equilibria in the whole Al-C-Co-Cr-Fe-Mo-Ni-Ta-W 9-component system and in a series of lower order systems among the 15 elements included in the database.

Binary and ternary systems have been assessed over the entire composition range and in the 0 to 4500 °C temperature range. A selection of them (often including the relative TDB file) is presented in the following pages Binary systems and Ternary systems.  

Special attention has been given to the selection of the most appropriate thermodynamic models for the GHEA phases. The consistency with the crystal structure. GHEA phase models are reported in the followiong page Phase models. 

The database implementation has been suppoted by key experiments performed by the COMAT group in order to improve or validate calculation results has been considered as the main criterion.

GHEA has already been succesfully applied to the prediction/interpretation of exprimental works involving selected HEAs.

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