Influence of Gadolinium with Small Content on Recrystallization Behaviour in Silver-Gold Alloys

摘要

The influence of small addition of RE element Gd on recrystallization behaviour in isomorphous Ag-Au alloys was studied by differential scanning calorimetry, optical microscopy, transmission electron microscopy and hardnessmeasurement. It is shown that in alloys with 0. 2% Gd, disperse second-phase particles are formed, which results in obvious increase in the recrystallization temperature and grain refining. The recrystallization temperature of AgAuGd0.2 alloys also increases with cold working. Small addition of Gd raises the apparent activation energy of recrystallization forAg-Au alloys.