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. 2016 Aug 9;9(8):669. doi: 10.3390/ma9080669

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© 2016 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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Intersection between the Gibbs energies of $α^{''}$ -Fe (blue) and α-Fe (yellow) at $T = 550$ K while gradually distorting the α-Fe lattice from its equilibrium state (0% α-Fe lattice distortion) to the maximum distortion given by Equation (6) (100% α-Fe lattice distortion). The lattice parameter of the $α^{''}$ -Fe phase is kept constant at its equilibrium value for every composition (see Equation (4)).