Abstract
Quasi-static tensile tests are performed on Cn-70.17% Zn-25.63% Af polycrystalline samples at constant room temperature. Temperature variations of the sample associated with martensitic transformations can be observed. The thermal data processing shows that no heat is globally exchanged between the sample and the surroundings during each «pseudo-elastic» hysteresis loop. These results stress the fact that, during these non-isothermal and non-adiabatic transformations, the dissipated energy remains equal to zero