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Proceedings Paper

Aluminum surface alloying with mixed excimer laser and CO2 laser beams
Author(s): Zhu Liu; Heinz Woellmer; Kenneth G. Watkins; William M. Steen
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Paper 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.

Paper Details

Date Published: 4 November 1994
PDF: 10 pages
Proc. SPIE 2246, Laser Materials Processing and Machining, (4 November 1994); doi: 10.1117/12.193125
Show Author Affiliations
Zhu Liu, Univ. of Liverpool (United Kingdom)
Heinz Woellmer, Univ. Erlangen (Germany)
Kenneth G. Watkins, Univ. of Liverpool (United Kingdom)
William M. Steen, Univ. of Liverpool (United Kingdom)

Published in SPIE Proceedings Vol. 2246:
Laser Materials Processing and Machining
Rolf-Juergen Ahlers; Peter Hoffmann; Hermann Lindl; Ruediger Rothe, Editor(s)

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