Abstract
It was performed a complex study of stability, crystallization kinetics and martensitic transformations of the melt-spun (MS) Ti50Ni25Cu25 alloy subjected to high pressure torsion (HPT). The amorphous MS Ti50Ni25Cu25 alloy was subjected to high-pressure torsion (HPT) at temperature of 20°C 10 turnes. HPT processing of the melt-spun amorphous Ti-Ni-Cu alloy does not effect on intensive nanocrystallization. HPT processing leads to a decrease of the energy of structural relaxation during heating up to 400°C, in comparison with the initial MS ribbons. The temperature of crystallization of the MS Ti50Ni25Cu25 alloy decreases after HPT processing. In the MS Ti50Ni25Cu25 alloy HPT processing and subsequent annealing produces noticeably finer grains than annealing at 450°C of the initial MS alloy. Consequently, HPT processing alters the crystallization kinetics of the MS Ti50Ni25Cu25 alloy. The size effect on the stabilization of martensitic transformation in nanocrystalline TiNiCu alloy has been established.
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