Stanislaw M. Dubiel, Jan Zukrowski
A redistribution of Cr atoms related to a phase decomposition caused by an isothermal annealing at 415 C in a 15.15 at%Cr Fe-Cr alloy was studied in a quasi-in-situ way by the conversion electrons M\"ossbauer spectroscopy. Analysis of the spectra enabled determination of average numbers of Cr atoms within the first (1NN) and within the second (2NN) neighbor shells versus annealing time, separately. The annealing-time evolution of these numbers, expressed in terms of short-range order (SRO) parameters, was shown to follow the Johnson-Mehl-Avrami-Kolgomarov equation. The SRO-parameter averaged over the 1NN-2NN shells was revealed to be lineraly correlated with the average hyperfine field.
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http://arxiv.org/abs/1211.0857
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