Abstract
Aluminum (Al)-V master alloys have attracted attention, because they can potentially be efficient grain refiners for wrought aluminum alloys. In this paper, the microstructure and factors affecting the microstructure of Al-4 wt pct V master alloys were investigated by means of controlled melting and casting processes followed by structure examination. The results showed that the type and morphology of the V-containing phases in Al-V master alloys were strongly affected by the temperature of the melt, concentration of vanadium in solution in the melt and the cooling conditions. Two main V-containing phases, Al3V and Al10V, which have different shapes, were found in the alloys prepared by rapid solidification. The Al3V phase formed when there were both a high temperature (1273 K to 1673 K (1000 °C to 1400 °C)) and a relatively high vanadium content of 3 to 4 wt pct, while the Al10V phase formed at a low temperature (<1373 K (1100 °C)) or a low vanadium content in the range of 1 to 3 wt pct. The results also showed that the type of V-containing phase that formed in the Al-4 wt pct V master alloy was determined by the instantaneous vanadium content.
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Acknowledgments
This work was financially supported by the Chinese National Natural Science Foundation (Youth) (No. 51004036), the Fundamental Research Funds for the Northeastern University (No. N110609002) and the National Basic Research Program of China (No. 2012CB619506).
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Manuscript submitted June 13, 2012.
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Meng, Y., Cui, J., Zhao, Z. et al. Study on Microstructures of Al-4 wt pct V Master Alloys. Metall Mater Trans A 45, 3741–3747 (2014). https://doi.org/10.1007/s11661-014-2314-1
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DOI: https://doi.org/10.1007/s11661-014-2314-1