Abstract:

The plates of Ni56Mn17Fe8Ga19  and Ni56Mn15Fe10Ga19 alloys with the thickness of 15 mm were made by pack-hot-rolling method. The microstructure, martensitic transformation behaviors and tensile properties of rolled alloys were studied. The results indicate that the hot-rolling treatment makes the grains and γ phases of alloys finer and tropistic along the rolling direction, the reverse martensitic transformation temperatures and thermal hysteresis decrease after rolling, and the fracture strengths and tensile strains exceed 500 MPa and 2%, respectively.

Key words: shape , memory , alloy,  , NiMnFeGa , alloy,  , hot-rolling,  , tensile , mechanical , property