Absorption of the laser beam during welding with CO/sub 2/ laser

• Autorzy: Hoffman J. , Szymański Z.
• Języki publikacji: EN

Abstrakty

EN

This paper concerns the absorption process of the CO/sub 2/ laser beam during laser welding. Both absorption mechanisms, i.e., Fresnel and plasma absorption, are considered. The analysis shows that the Stratton far-infrared approximation fairly well describes the Fresnel absorption of metals near the boiling point. The absorption coefficients for several metals as Fe, Ti, Al and Cu are calculated as a function of temperature. These coefficients are used to calculate the total absorption of the CO/sub 2/ laser beam during laser welding of iron and aluminium. The results show the role of specific absorption mechanisms as first Fresnel reflection, multiple reflections and plasma absorption during keyhole welding. Significant differences in the case of iron and aluminium are found in the agreement with experimental observations.

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2002
• Tom: Vol. 32, nr 1-2
• Strony: 129--145
• Opis fizyczny: bibliogr. 31poz.

Twórcy

autor

Hoffman J.

autor

Szymański Z.

• Institute of Fundamental Technological Research, ul. Świętokrzyska 21, 00-049 Warszawa