Analysis of possibility of carbon redistribution in cementite lattice

On the basis of existing ab initio calculation of energy of a carbon atom in the "normal" octahedral pore of cementite lattice (related to "normal" prismatic pore) its energy in the "distorted" prismatic and octahedral pores is estimated. A theory is developed that permits to find concentration of carbon atoms in various types of pores. It is shown that supposition that some of carbon atoms are transferred to "distorted" pores cannot explain the observed changes in EELFS spectra of cementite after long annealing of pearlite below Ac1