Mössbauer studies on athermal martensite formation in an Fe�?�Ni�?�Mn alloy

[摘要] In this study, austeniteâ€�?�martensite phase transformations which are formed by cooling effect in Feâ€�??30% Niâ€�??0.2% Mn alloy are investigated with Mössbauer spectroscopy and scanning electron microscopy. The single peak of the paramagnetic phase and the six peaks of the ferromagnetic phase of Feâ€�??30% Niâ€�??0.2% Mn alloy were observed in the Mössbauer spectrum. The internal magnetic field strength of ferromagnetic martensite phase was determined as 33.8 ð‘�?? and the isomer shift values were determined as â€�?? 0.11 mm.sec^â€�??1 and â€�?? 0.06 mm.sec^â€�??1, respectively, for the austenite and martensite phases. In this alloy, athermal transformation was observed. The results obtained are in agreement with literature.

[学科分类] 材料工程

[关键词] Austeniteâ€�?�martensite;Mössbauer spectroscopy;scanning electron microscopy;isomer shift.