"THE EFFECT OF THE HEAT TREATMENT TEMPERATURE ON THE THERMODYNAMIC PROPERTIES OF THE 55.89wt%Ni-Ti SHAPE MEMORY ALLOY"

In this study, the relationship between the heat treatment temperature and the thermodynamic properties of the Ni rich NiTi shape memory alloy (SMA) was investigated. The characterization of the thermoelastic martensitic transformation was based on differential scanning calorimetry (DSC) experiments. It has been shown that the equilibrium temperature, enthalpy and entropy are strongly influenced by the variation of the heat treatment temperature. Moreover, the evolution of both elastic and dissipation energies as function of this parameter during the transformation process was discussed. The obtained results were largely in line with previously published studies.