Aluminum surface alloying with mixed excimer laser and CO2 laser beams

Zhu Liu; Heinz Woellmer; Kenneth G. Watkins; William M. Steen

doi:10.1117/12.193125

4 November 1994 Aluminum surface alloying with mixed excimer laser and CO₂ laser beams

Zhu Liu, Heinz Woellmer, Kenneth G. Watkins, William M. Steen

Proceedings Volume 2246, Laser Materials Processing and Machining; (1994) https://doi.org/10.1117/12.193125
Event: Optics for Productivity in Manufacturing, 1994, Frankfurt, Germany

Abstract

Aluminum is a highly reflective and thermally conductive material that is often difficult to process with laser beams. Oxide films on the surface can prevent surface alloying as with the case of Cr alloying into aluminum by in-situ powder feeding. This paper describes a new technique using mixed excimer laser and CO₂ laser beam processing to generate a Cr alloyed layer on a 2014 aluminum alloy substrate. It is shown that improvement of alloying homogeneity following in-situ powder feeding can be achieved with mixed beam processing. Conditions under which this can be achieved have been studied and the affect of laser processing parameters on the surface roughness, oxidation and absorption is discussed. Microstructural and surface morphological analysis using optical microscopy and SEM are also discussed.

Citation Download Citation

Zhu Liu, Heinz Woellmer, Kenneth G. Watkins, and William M. Steen "Aluminum surface alloying with mixed excimer laser and CO₂ laser beams", Proc. SPIE 2246, Laser Materials Processing and Machining, (4 November 1994); https://doi.org/10.1117/12.193125

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