Copper-alloy module

In this thermodynamic-kinetic module, the main instruments of the convectional solute redistribution models, i.e., the material balance equations and Fick’s laws of solute diffusion, were incorporated into the proper set of thermodynamic chemical-potential-equality equations, which relate the phase interface compositions to both the temperature and the phase stabilities. Depending on the alloy composition and cooling rate, the module determines the phase fractions and compositions of the liquid during solidification; and also calculates important thermophysical material data (Gibbs energy, enthalpy, entropy, specific heat capacity, thermal conductivity and density from the liquid state down to room temperature) for copper alloys containing Ag, Al, Cr, Fe, Mg, Mn, Ni, Pb, Si, Sn, Zn, and Zr.

The module makes use of experimental thermodynamic and phase diagram data as well as solute diffusion data from IET and National Academy of Sciences, which are fed in as measured values.

Input data

Composition ranges

User should apply the recommended composition ranges given below.

Output data

After the execution of program, the results are displayed as xxxx % Solut. =…, Cool.r. =…, where xxxx refers to alloy type; % Solut. refers to nominal liquid composition of alloying elements [wt%]; and cool.r. refers to the cooling rate of solidification process.