Abstract
Fluidity of Ti-4Mo-3V-4Cr-0.5Fe-3.5Al-xO alloy with different contents of oxygen addition has been studied. The fluidity of alloy displays obviously improvement with the enhancement of oxygen contents up to 0.6 wt%.The influence of oxygen on the microstructure and thermophysical parameters is analyzed and discussed. With increase of the oxygen content, the changes of superheat, solidification interval width, viscosity, and density exhibit negative effects on the fluidity of alloy melt. However, the refined grains, enhanced crystallization latent heat, and declined thermal conductivity play positive effects on the evolution of fluidity for alloy melt. And positive effects dominate the evolution of fluidity. Therefore, the addition of oxygen can improve the fluidity of Ti-4Mo-3V-4Cr-0.5Fe-3.5Al.
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