1 February 1991 Thermocapillary effects in a melted pool during laser surface treatment
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Proceedings Volume 1397, 8th Intl Symp on Gas Flow and Chemical Lasers; (1991) https://doi.org/10.1117/12.26021
Event: Eighth International Symposium on Gas-Flow and Chemical Lasers, 1990, Madrid, Spain
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.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. Morvan, D. Morvan, Francois Dominique Cipriani, Francois Dominique Cipriani, Daniel Dufresne, Daniel Dufresne, A. Garino, A. Garino, } "Thermocapillary effects in a melted pool during laser surface treatment", Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); doi: 10.1117/12.26021; https://doi.org/10.1117/12.26021
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