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Effect of Alloying Elements on the α-γ Phase Transformation in Iron

Physics Department and Research Center OPTIMAS, University Kaiserslautern, Erwin-Schrödinger-Straße, D-67663 Kaiserslautern, Germany
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Materials 2019, 12(8), 1355; https://doi.org/10.3390/ma12081355
Received: 8 April 2019 / Revised: 17 April 2019 / Accepted: 22 April 2019 / Published: 25 April 2019
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Abstract

Small concentrations of alloying elements can modify the α - γ phase transition temperature T c of Fe. We study this effect using an atomistic model based on a set of many-body interaction potentials for iron and several alloying elements. Free-energy calculations based on perturbation theory allow us to determine the change in T c introduced by the alloying element. The resulting changes are in semi-quantitative agreement with experiment. The effect is traced back to the shape of the pair potential describing the interaction between the Fe and the alloying atom. View Full-Text
Keywords: iron; iron alloy; phase transformation; free energy iron; iron alloy; phase transformation; free energy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Meiser, J.; Urbassek, H.M. Effect of Alloying Elements on the α-γ Phase Transformation in Iron. Materials 2019, 12, 1355.

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