Abstract
The causes of emergence of wavelike variations in the cross section of metal fibers obtained by pendant drop melt extraction on a cold rotating wheel in vacuum are analyzed. The theoretical results are confirmed by experimental data for fibers made from aluminum and the VT1 titanium alloy. It is shown that the variation in the diameter and fiber breaking are caused by capillary waves (Rayleigh waves) on the surface of the melt drop, which are induced by rotation of the cold rotating wheel. The waves at the fiber surface apparently emerge under the effect of vibrations with frequencies higher by a factor of 3000–3500 compared with the rotation speed of the wheel or by the defects located on the fiber surface at a distance of ∼0.2–0.3 mm from each other.
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