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Erschienen in:
21.02.2020
Modified Microstructure Selection Map and Growth Conditions of the Band Structure in Directionally Solidified Hypo-Peritectic Alloys
Erschienen in: Metals and Materials International | Ausgabe 5/2021
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Abstract
Considering the variation of the solid/liquid interface morphology with a growth condition, microstructure selection map in peritectic system was modified by comparing growing α (primary phase) interface tip temperature and β (peritectic phase) nucleation temperature. The results were proved experimentally in hypo-peritectic Sn–Cd alloys by delicate directional solidification experiment under the diffusive growth condition using capillary thin tube. When β-phase took over α-phase and grew a short distance as the leading phase, the instability of β-phase was first observed experimentally. This phenomena was explained by constitutional undercooling, which was present temporarily in liquid ahead of the β/l interface.
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