Plume attenuation under high power Nd:yttritium–aluminum–garnet laser welding
作者： J. Greses , P. A. Hilton , C. Y. Barlow , W. M. Steen
DOI: 10.2351/1.1642636
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摘要: During high-power continuous wave (cw) Nd:yttritium–aluminum–garnet (YAG) laser welding a vapor plume is formed containing vaporized material ejected from the keyhole. The gas used as control mechanism affects shape but not its temperature, which has been found to be less than 3000 K, independent of atmosphere and gases. In this study (up 8 kW) cw Nd:YAG performed under He, Ar, N2 atmospheres, extending power range previously studied. was contain very small evaporated particles diameter 50 nm. Rayleigh Mie scattering theories were calculate attenuation coefficient incident by these particles. addition 9 W probe beam, horizontally across generated laser, measured at various positions with respect beam-material interaction point. Up 40% pro...
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