Tensile and compressive stress-strain characteristics for Ni-Ga-Fe ferromagnetic shape memory alloys were investigated. The crystal structure of the martensite phase obtained by tensile-stress-induced martensitic transformation was calculated from the degree of the transformation strain. It was shown that the parent phase with L21 transforms into the stress induced martensite phase with 14M by tensile stress and by applying further stress, the 14M stress induced martensitically transforms into L10. It was found that variant rearrangement occurred by very low compressive stress less than 3 MPa.
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