Abstract
Abstract The kinetics of the A1→B2 phase transition in the cryogenically deformed Cu-47at.%Pd alloy has been compared with that both after room-temperature deformation and after quenching from high temperature. For this aim, the evolution of the microstructure, electrical properties and microhardness of the alloy during disorder→order transformation at 400 °C were studied. It was shown that annealing at 400 °C for 1 h led to the formation of a uniform ultrafine-grained ordered structure in the cryo-deformed alloy. In turn, the annealing duration of 1 h is not enough to finish the ordering process in the quenched sample. It was found that some volume of the ordered B2-phase was formed in the cryo-deformed Cu-47at.% Pd alloy after holding at room temperature for 0.5 year.
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