The Fe-Al-Mn-C system is widely studied for automotive applications due to its good mechanical properties and relatively low density. Our work is devoted to the atomic-scale modeling of this system and to start with, we focused on the well-documented Fe-Al binary system. More precisely, we tested the capability to reproduce its phase diagram combining ab initio calculations and cluster expansion methods. Several models were built using different input atomic configurations: pure iron, a substitutional aluminium atom diluted in iron, pairs of substitutional aluminium atoms located at different neighbour shells and complementary structures (B2, B32 and D03). Long-range order parameters (occupation of sublattices) were defined to analyse the equilibrium configurations generated by Monte-Carlo runs in the semi-grand canonical ensemble. Phase diagrams were plotted for each model and compare well with experimental ones.
CITATION STYLE
Dequeker, J., Legris, A., Besson, R., & Thuinet, L. (2017). Atomic-scale modeling of Fe-Al-Mn-C alloy using pair models and monte-carlo calculations. In Minerals, Metals and Materials Series (Vol. Part F6, pp. 393–401). Springer International Publishing. https://doi.org/10.1007/978-3-319-51493-2_37
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