Measurement of the Surface Tension of Undercooled Liquid Ti90Al6V4 by the Oscillating Drop Technique

The surface tension of liquid Ti90Al6V4 was measured. The samples have been processed containerlessly by electromagnetic levitation, which allows the handling of highly reactive materials and measurements in the undercooled temperature region. The use of digital image processing allows the identification of oscillation modes and calculation of the surface tension from the l=2 and m=0, m=2 oscillation modes. A linear least squares fit to the data showed the following temperature dependence: c=1.389±0.09−9.017×10−4±5.64×10−5(T−1660°C) [N·m−1]