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Mechanism-guided control of high-spatial-frequency roughness in small-diameter plasma jet machining by suppressing near-surface vortex-induced transport
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DOI：10.1016/j.ijmachtools.2026.104400.png)
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Abstract
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• Generic mechanism of roughness deterioration induced by small-diameter plasma jet. • Near-surface shear gradient triggers Kelvin-Helmholtz instability and vortices. • Vortex-induced enhancement of near-surface mass transfer in plasma jet. • Vortex-shaped etch pits identified as cause of surface roughness deterioration. • Mechanism-guided process optimization suppresses vortices and prevents deterioration.
Keywords:
small-diameter plasma jet
high-spatial frequency roughness
meso-scale vortices
plasma chemical vaporization machining
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