Martensite stabilization in a high temperature Ni-Mn-Ga alloy

Martensite stabilization upon martensite ageing has been observed for many alloys undergoing thermoelastic martensitic transformation. In this paper, it is reported for the first time in a ferromagnetic Ni-Mn-Ga shape memory alloy. The stabilization increases with ageing time and temperature, and the activation energy of the process has been calculated.