Journal of Materials Science

, Volume 29, Issue 3, pp 728–735 | Cite as

Laser-modified aluminium surfaces with iron

  • L. Gjønnes
  • A. Olsen


Possible improvements in the mechanical properties of surface-coated aluminium have been investigated. Aluminium plasma sprayed with iron powder was processed using two different laser-beam settings (integrated and defocused) with varying processing parameters. Mechanical and microstructural characterizations of the specimens revealed great differences between the two laser-beam settings. The defocused laser beam showed a clear improvement of hardness which was not observed for the integrated laser beam. The integrated laser beam gave deep melt pools with large Al3Fe particles (10–200 μm) in the top layer, and smaller α-Al (Fe, Mn)Si particles (0.1–0.3 μm) throughout the melt pool. Small, partly coherent Al3Fe precipitates (0.25 μm long) were found between the large Al3Fe particles. Processing with a defocused laser beam produced a shallower melt pool with a homogeneous distribution of the iron in the form of Al3Fe particles.


Iron Polymer Aluminium Mechanical Property Laser Beam 
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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • L. Gjønnes
    • 1
  • A. Olsen
    • 1
  1. 1.Center for Materials Research/Department of PhysicsUniversity of OsloOsloNorway

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