Abstract
Differential scanning calorimetry (DSC) and x-ray diffraction (XRD) have been used to probe the martensitic transformation behaviors of Ni-Fe-Ga magnetic shape memory alloys. A complete intermartensitic transformation was observed in polycrystallineNi56556.5Fe19019.0Ga2452 4.5和Ni56356.3Fe17017.0Ga2672 6.7 alloys, which is stimulated by the change of temperature and include s an intermartensitic transformation and the corresponding retransformation. The intermartensitic transformation and the martensitic transformation are both the rmoelastic and the martensitic phases existing at room temperature are character ized as a monoclinic 14M structure.
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