Conquering the production of Cu-Au, Cu-Ag, Cu-Pt, Cu-Pd, Cu-Rh cast alloys of improved properties by applying the anneal hardening mechanisms

Investigations will be carried out on the cast copper-base samples of Cu-4at.% Au, Cu-4at.%, Ag Cu-4at.% Pt, Cu-4at%Pd, Cu-4at%Rh alloys, as well as pure copper samples, for the sake of comparison. The samples of copper and alloys will be subjected to the same thermo mechanical treatment. The thermo mechanical treatment include the homogenized annealing, prefinal cold rolling, solution annealing, final cold rolling with a final reduction of 20, 40 and 60 % as well as the isochronal and isothermal annealing up to the recrystallisation temperature. The influence of thermo mechanical treatment on the strenthening mechanisms (alloying, cold deformation and main anneal hardening)and structural changes of cast copper-base alloys will be investigated for the hardness and electrical conductivity measurements as well as optical microscopy, SEM, TEM, DTA, DSC, RTG and mechanical testing. Also investigation of corrosion behaviour will be investigated. The mechanical and physical properties will be improvemented because anneal hardening effect ocours in investigated alloys.