Loss of aluminium during the process of Ti-Al-V alloy smelting in a vacuum induction melting (VIM) furnace

L. Blacha, G. Siwiec, B Oleksiak Silesian University of Technology, Department of Metallurgy, Katowice, Poland In the present paper, results of the study on changes in basic Ti-6Al-4V alloy component contents during smelting in the vacuum induction melting (VIM) furnace are presented. The experiments were performed at 5 – 1 000 Pa and 1 973–2 023 K. Assuming that the observed loss of aluminium from the alloy during smelting is the eff ect of evaporation, an additional thermodynamic analysis was performed aimed at determining evaporation coeffi cients.