The influence of convection on the homogeneity of laser-applied coatings

The influence of convection on the homogeneity of laser-applied coatings

During laser alloying, a melt pool is created at the passage of a laser beam in which mixing occurs by convection because of surface tension gradients. This mixing process in the melt bath is reported in different alloying elements on Al (Mn, Ni, cobalt) and steel (Ni) substrates and a homogeneous d...

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Veröffentlicht in:Journal of materials science 1991-02, Vol.26 (3), p.711-714
Hauptverfasser: HEGGE, H. J, DE HOSSON, J. T. M
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Exact sciences and technology
Metals. Metallurgy
Other surface treatments
Production techniques
Surface treatment
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Beschreibung
Zusammenfassung:During laser alloying, a melt pool is created at the passage of a laser beam in which mixing occurs by convection because of surface tension gradients. This mixing process in the melt bath is reported in different alloying elements on Al (Mn, Ni, cobalt) and steel (Ni) substrates and a homogeneous distribution did not appear to be evident. It is concluded that density differences, interface tensions and diffusion are the main factors affecting the mixing process. Photomicrographs. 17 ref.--AA(UK/US).
ISSN:0022-2461
1573-4803
DOI:10.1007/BF00588308