Abstract
Carbon solubility in a face centred cubic (fcc) Fe1-yNiy alloy lattice was analysed on the basis of statistical thermodynamics assuming negligible C—C interaction in the fcc Fe1-yNiy lattice. The minimum carbon solubility was observed for values of y of ∼ 0·6–0·7 and appeared to be ascribable to the minimum number of available interstitial sites for occupation by carbon atoms in the fcc Fe1-yNiy lattice around this composition. Accordingly, the extent of stabilisation for carbon atoms in the fcc Fe1-yNiy was estimated to be a minimum around this composition. The observed variation for the carbon solubility and the extent of stabilisation of the carbon atoms in the fcc Fe1-yNiy lattice with respect to the composition y appeared to be related to the stability of the ferromagnetic phase.
MST/3251
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