Martensitic transformations and kinetics in Ti-Ni-Cu-Hf shape memory alloy

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. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The study investigated the martensitic transformation and its kinetics in the Ti-Ni-Cu-Hf shape memory alloy, revealing a strong dependence of transformation kinetics on cooling rate. The apparent activation energy was calculated and the variation of transition activation energy for a specific martensite fraction was studied to further characterize the martensitic transformation kinetics.