Abstract
Using molecular-dynamics simulation, we study the temperature induced bcc/fcc phase transformation of random Fe1−x Ni x alloys in the concentration range of x ≤ 40 at%. The Meyer-Entel potential describes faithfully the decrease of the transition temperature with increasing Ni concentration. The austenite transformation proceeds by homogeneous nucleation and results in a fine-grained poly-crystalline structure. The transformation follows the Nishiyama-Wassermann orientation relationship. The martensite phase nucleates at the grain boundaries (heterogeneous nucleation). Even for the largest crystallite studied (2.75 × 105 atoms) the back-transformation results in a single-crystalline grain containing only a small amount of defects. The morphological changes in the transformed material show no significant dependence on Ni content.
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Sak-Saracino, E., Urbassek, H.M. Temperature-induced phase transformation of Fe1-xNix alloys: molecular-dynamics approach. Eur. Phys. J. B 88, 169 (2015). https://doi.org/10.1140/epjb/e2015-60227-x
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DOI: https://doi.org/10.1140/epjb/e2015-60227-x