MOESSBAUER EFFECT OF THE LOW TEMPERATURE MARTENSITE PHASE OF HIGH CARBON MANGANESE STEEL.

The Moessbauer spectrum of Fe**5**7 in the low temperature martensite phase of Fe-3 wt% Mn-1. 6 wt% C alloy exhibits a new component, as well as in the martensite of iron-carbon and iron-nickel-carbon alloys, which arises from the Fe**5**7 atoms adjacent to the carbon atoms in the tetrahedral interstices. Changes in the Moessbauer spectrum and electrical resistivity during the tempering of freshly formed martensite are observed and the conclusions are obtained with respect to the movement of carbon atoms in the martensite structure during and after the martensitic transformation.