Solid state transformations of Au-Cu-Pt alloys studied by in-situ X-ray synchrotron radiation and DSC

► In-situ synchrotron X-ray diffraction of ordering/disordering in Au-Cu-Pt alloys. ► Increasing Pt content causes a transition from 100% L10 to L10 + L12 to 100 % L12. ► In fully L10 alloys ordering proceeds by nucleation and growth. ► In fully L10 alloys disordering is homogeneous and gradual, suggesting a role of APBs.