Thermodynamics of ordering-disordering transformation in Cu-Zn alloy system

The alpha and beta phases in Cu-Zn alloy system were regarded as regular so lutions at elevated temperature, the results calculated from the experiment al data have showed that the value of the interaction parameter of componen ts Cu and Zn in the alpha phase E-CuZn(alpha) varied obviously with decreas ing component Zn. Substituting the function relation between E-CaZn(alpha) and X-Zn obtained through curve-fitting into expression of free-energy vari ation of the system, the calculated martensitic transformation temperature M-s was in good agreement with experimental curve, so as to have more compr ehensive information for fully making use of binary Cu-base functional mate rials.