Athermal and isothermal martensitic transformations induced at room temperature by ultra high magnetic field

Abstract

Effects of ultra high magnetic field of both pulse and steady types on martensitic transformation have been studied, using Fe-Ni-Mn, Fe-Ni-Mn-C alloys with the supplemental tests on Fe-Ni-C and Fe-Ni-Co-Ti alloys. It is found that the martensitic transformation is induced at room temperature not only athermally but also isothermally either by pulse magnetic field or by steady magnetic field for Fe-Ni-Mn and Fe-Ni-Mn-C alloys. This fact is in sharp contrast with that no martensite is induced by ultra high magnetic field for Fe-Ni-C andFe-Ni-Co-Ti alloys.