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Eutectic solidification characteristics of Bridgman grown AI-3Fe-0.1V alloy

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Abstract

Eutectic solidification characteristics of Al-2.85 wt%Fe-0.12 wt% Valloy have been investigated by steady-state growth over the range of solidification front velocity from 51 to 1030μm/s and temperature gradient 8 to 15 K/mm. Increasing growth velocity displaced the αAl-Al3Fe eutectic by αAl-AlxFe eutectic rather than by the αAl-Al6Fe eutectic obtained for the binary Al-3 wt%Fe alloy. A fully αAl-AlxFe eutectic structure has been obtained for the first time in the vanadium-containing alloy over the growth velocity range from 71 to1030μm/s except at 100 and 510μm/s where some αAl dendrites were present in the eutectic matrix. TheαAl-AlxFe eutectic was observed to undergo a morphological transition from lamellar to rod-like with increasing growth velocity concurrently with formation of a cellular eutectic structure. It was found that the relationship λ= Av−1/2, between eutectic spacing λ and growth velocity v, was applicable with A = 22.4 ± 1.8 and 13.8 ± 2.1 μm3/2s−1/2 for lamellar and rod-like αAl-AlxFe eutectics, respectively.

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Authors and Affiliations

  1. Department of Engineering Materials,, University of Sheffield,, Mappin Street,, Sheffield,, S1 3JD,, UK

    Y. Wang & H. Jones

  2. Banbury Laboratory,, Alcan International Limited,, Southam Road, Banbury,, Oxon,, OX16 7SP,, UK

    P.V. Evans

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  1. Y. Wang
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  2. H. Jones
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  3. P.V. Evans
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Wang, Y., Jones, H. & Evans, P. Eutectic solidification characteristics of Bridgman grown AI-3Fe-0.1V alloy. Journal of Materials Science 33, 5205–5220 (1998). https://doi.org/10.1023/A:1004483904519

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