Effect of Nitriding on Phase Transformations in the Fe-Mn Alloys

Authors : K. G. BINNATOV, I. I. ALİ-ZADE

Pages : 537-542

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :We present results concerning the nitriding effects on phase transformations in Fe -- 40 at. % Mn and Fe -- 50 at. % Mn alloys. These alloys were studied by means of X-ray diffraction and Mössbauer-effect spectroscopy methods at room temperature. Results indicate that, after nitriding, in the absorption spectra of these alloys appears lines with hyperfine field H\sim 330 kOe which corresponds to the field on the 57 Fe nuclei in the a -Fe. Annealing of the alloys at 650 oC temperature insert ignore into journalissuearticles values(nitriding temperature); in argon atmosphere do not change the form of the M\\`{o}ssbauer absorption spectra. It appears that the nitriding process affect the microstructure of these alloys and leads to g \to a phase transformations in the Fe-Mn alloys. The distribution function of effective hyperfine magnetic field Pinsert ignore into journalissuearticles values(H); on the 57 Fe nuclei in the Fe-40 at.% Mn alloy after hardening processes has one maximum with Heff \sim 37 kOe, while nitriding processes leads to the appearance of two maxima with Heff \sim 6 kOe and Heff \sim 27 kOe in the Pinsert ignore into journalissuearticles values(H); curve of this alloy. Analogical results were obtained after nitriding processes for Fe-50 % Mn alloy.
Keywords : Fe Mn alloys, Nitriding, Fine atomic structure, Mössbauer effect spectroscopy