Influence of plastic deformation on the microstructural and magnetic properties of some Fe-based alloys

Abstract

We report the morphological and magnetic properties of deformation-induced martensite characteristics in the austenite phase of Fe69Ni27Mn4 and Fe67Ni27Mn4Zn2 (wt %) alloys after 30% plastic deformation. Scanning electron microscopy (SEM) and also physical property measurement system (PPMS) facilities were applied to investigation to clarify the deformation-induced martensite characteristics from morphological and magnetic points of view. Scanning electron microscope observations showed elongated deformation-induced martensite morphology in the austenite phase of the examined alloys. Additionally, two alloys exhibited typical ferromagnetism in their martensite phase. The saturation magnetization (M-sat) was found to be firstly increased and then decreased with increasing temperature. We found that the % Zn addition shifts the Curie temperature (T-c) of Fe-Ni-Mn alloys to higher temperatures. The largest M-sat (similar to 27 emu center dot g(-1)), the H-c (similar to 26 Oe), and T-c (similar to 248) were obtained for the Fe-Ni-Mn-Zn alloy with a mixed configuration of bcc and fcc phases.