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Proceedings Paper

Thermocapillary effects in a melted pool during laser surface treatment
Author(s): D. Morvan; Francois Dominique Cipriani; Daniel Dufresne; A. Garino
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Paper Abstract

Laser surface treatment represents a promissing new technology for materials processing. The main advantage of lasers is constituted by the facility to deposite high density energy at the surface of a material which permits to obtain a narrow heat affected zone and low distortion. During the surface melting of a material, the heat flow in the melted pool is dominated by convective effects. The temperature gradient on the melted pool surface between the laser beam impact point and the pool boundary generates surface tension gradient and therefore a surface tangential strain which produces convective motions (Marangoni convection). In this paper we presents a numerical model of the thermocapillary flow in a melted pool created by a scanning CW laser. We analyse the effects of experimental conditions as scanning velocity and beam dimension upon the intensity of the thermocapillary flow, the dimensions and the shape of the melted zone.

Paper Details

Date Published: 1 February 1991
PDF: 4 pages
Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); doi: 10.1117/12.26021
Show Author Affiliations
D. Morvan, Institut de Mecanique des Fluides (France)
Francois Dominique Cipriani, Institut de Mecanique des Fluides (France)
Daniel Dufresne, Institut de Mecanique des Fluides (France)
A. Garino, Institut de Mecanique des Fluides (France)

Published in SPIE Proceedings Vol. 1397:
8th Intl Symp on Gas Flow and Chemical Lasers
Concepcion Maroto Domingo; Jose M. Orza, Editor(s)

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