Abstract
The amounts of latent heat of the martensitic transformation in Nickel Titanium shape memory alloys with different compositions between 48.0 at.% and 51.0 at.% of Ni were measured with a differential scanning calorimeter. The results indicate that the solution-treated samples show larger amount of latent heat than those after thermo-mechanical processing. The largest amount of 37.5 J/g was obtained in the equiatomic alloy annealed at 1,100 °C followed by quenching. It was suggested from the present result together with literature survey that NiTi shape memory alloys may be novel solid-state heat-storage materials.
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