Abstract
In the solidification of Fe-Ni droplets (≤ 30 at.% Ni), the selection of different microstructures is dominated by the competition between the bcc and ccp phases. In drop-tube experiments ccp is the primary phase in some dilute (up to 7at% Ni) alloys although the bcc phase is favoured by a lower free energy and by a lower interfacial energy with the liquid. Competitive dendrite growth is a possible explanation for the formation of primary ccp. Comprehensive thermodynamic (CALPHAD) and kinetic modelling is undertaken to understand the growth competition. The origin of the observed primary phases is discussed.
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Gärtner, F., Norman, A.F., Assadi, H. et al. Competitive Phase Selection in Fe-Ni Alloy Droplets. MRS Online Proceedings Library 398, 51–56 (1995). https://doi.org/10.1557/PROC-398-51
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DOI: https://doi.org/10.1557/PROC-398-51