Abstract
We present a novel methodology for preparing as-cast Ti-Al-V alloy directly from titanium-rich material through a thermite reduction. The new method is shown to be feasible through a thermodynamics and dynamics analysis. The as-cast Ti-Al-V alloys synthesized from titanium dioxide, rutile, and high-titanium slag were analyzed by an x-ray diffractometer, a scanning electron microscope, an inductively coupled plasma emission spectrometer, and an oxygen/nitrogen/hydrogen analyzer. The results indicate that the alloy is composed of a Ti-Al-V matrix and Al2O3 inclusions. The Al and V contents in the matrix are close to the mass ratio of Ti-6Al-4V (Al: 5.5–6.8 wt.%, V: 3.5–4.5 wt.%). The Si and Fe in the alloys synthesized from rutile and high-titanium slag can be used as alloying elements in low-cost titanium alloys. The present method is expected to be useful for preparing Ti-Al-V alloys at a low production cost.
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Acknowledgements
This research was supported by the National Natural Science Foundation of China (51422403, 51504064, 51274064), basic research universities special fund operations (N162505002, N140204013, N130102002), and National Basic Research Program of China (973 Program, No. 2013CB632606).
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Cheng, C., Dou, Z.H., Zhang, T.A. et al. Synthesis of As-Cast Ti-Al-V Alloy from Titanium-Rich Material by Thermite Reduction. JOM 69, 1818–1823 (2017). https://doi.org/10.1007/s11837-017-2467-7
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DOI: https://doi.org/10.1007/s11837-017-2467-7