Isothermal Martensitic Transformation of γ-FeN in a Magnetic Field

抄録

Isothermal martensitic transformation of the γ-FeN was found to occur in magnetic field at temperatures above the Ms. Molar fraction of martensite monotonically increases with increasing isothermal aging time, and saturates at a value proportional to applied magnetic field. Temperature and magnetic field dependence of the saturation value indicates that the transformation does not proceed above the temperature where the value become zero in a given magnetic field. Application of magnetic field reveals intrinsic isothermal character of the martensitic transformation in the γ-FeN hidden behind the complication associated with magnetization process of the α′ phase.