Abstract
The purpose of the paper was to investigate the martensitic transformation and its kinetic of the Ti-Ni-Cu-Hf shape memory alloy. The Ti47Ni44Cu6Hf3 alloy would undergo a reversible B2 ↔ B19′ martensitic transformation during thermal cycling process. The apparent activation energy was calculated based on seven different DSC cooling curves. A strong cooling rate dependence of martensitic transformation kinetics was observed and the corresponding mechanism was discussed. Moreover, the variation of transition activation energy for a specific martensite fraction was studied to further characterize the martensitic transformation kinetics.
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