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Proceedings Paper

Oscillatory regime of metallic plate breakdown under laser beam
Author(s): Alexander F. Banishev; Vladimir S. Golubev; M. M. Novikov; Olga D. Khramova
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Paper Abstract

Dynamics of keyhole formation in metal plates of Mo, W, Ni, stainless steel have been studied under the solid-state laser pulse effect ((lambda) equals 1.06 micrometers ). Velocities of the keyhole bottom motion have been determined for these metals in the (0.5 (DOT) 105 - 106) W/cm2 range of irradiated power densities. A pulse regime of plate breakdown has been found out. Small-dimensional structures with d is congruent to 1 micrometers period were found on the keyhole walls, which, in our opinion, can contribute significantly to laser beam absorption. A new form of periodic structure has been revealed, being a helix-shaped modulation of the keyhole walls and bottom relief. Temperature variation were discovered in the keyhole, related to capillary waves propagation in the melt layer.

Paper Details

Date Published: 1 April 1994
PDF: 10 pages
Proc. SPIE 2257, Russia National Conference: Industrial Lasers and Laser Material Processing, (1 April 1994); doi: 10.1117/12.171651
Show Author Affiliations
Alexander F. Banishev, Scientific Research Ctr. for Technological Lasers (Russia)
Vladimir S. Golubev, Scientific Research Ctr. for Technological Lasers (Russia)
M. M. Novikov, Scientific Research Ctr. for Technological Lasers (Russia)
Olga D. Khramova, Scientific Research Ctr. for Technological Lasers (Russia)


Published in SPIE Proceedings Vol. 2257:
Russia National Conference: Industrial Lasers and Laser Material Processing
Vladislav Ya. Panchenko; Vladimir S. Golubev, Editor(s)

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