Checking the model for dynamic disordering in CuAu

The disordering transformation in stoichiometric CuAu measured under dynamic heat treatment shows an unexpected retrograde shift to lower temperatures upon increasing the heating rate. Measurements spanning almost three orders of magnitude in heating rate were done in order to check a previously proposed model of this effect. The combined disordering of the superheated long-range ordered CuAu I and CuAu II phases is shown to be responsible for this behaviour.