18 January 1985 Displacement Of Molten Metal Under High-Repetition-Rate Pulsed Irradiation
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Proceedings Volume 0473, Symposium Optika '84; (1985) https://doi.org/10.1117/12.942460
Event: Symposium Optika '84, 1984, Budapest, Hungary
The processes occuring due to high-pulse-repetition rate laser beam interaction with metals have been studied by now very poorly both theoretically and experimentally. In the same time, first high repetition rate (HRR) pulsed laser applications to materials processing attract some interest to such a study. The investigation of possible improvement, theof the cw-laser-induced processes by using cw and HR R lasers together is also prospective. The melt removal mechanisms studied both theoretically and experimentally are the subject of the present paper. The pulse approximation of hydrodynamical equations is valid to describe the molten metal motion generated by laser puls of 1-100 μs duration. Reasonable agreement between theoretical estimations of velocity and escape time of the melt and experimental data was achieved. High-repetition rate pulsed processing was also investigated. The model of deep penetration by a HRR laser is put forward. It explaines the greater penetration ability of a HRR laser as compared to the cw laser of the same output power.
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R. V. Arutyunyan, V. Yu. Baranov, L. A. Bol'shov, E. P. Velikhov, A. N. Gorlenkov, V. A. Folgov, D. D. Malyuta, V. S. Mezhevov, V. D. Pis'mennyi, "Displacement Of Molten Metal Under High-Repetition-Rate Pulsed Irradiation", Proc. SPIE 0473, Symposium Optika '84, (18 January 1985); doi: 10.1117/12.942460; https://doi.org/10.1117/12.942460

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