Abstract
Thermal expansion characteristics of Ni_53.6Mn_27.1Ga_19.3 alloy have been measured in the temperature range of 25 to 370 °C. The influence of the heating/cooling rate on the transient temperatures and hysteresis has been studied in the temperature range of the phase transformations. The transformation temperatures do not depend on the heating/cooling rates. The phase transformation martensite ↔ austenite occurs at the same temperature at heating and cooling. Hysteresis is a consequence of the latent heat. The sample temperature depends on the complicated process of the heat conduction and the phase transformation that take places in cooperation.

Key words
SMA, martensitic phase transformations

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