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Journal of Materials Science

, Volume 29, Issue 13, pp 3393–3398 | Cite as

Functionally gradient titanium-aluminide composites produced by laser cladding

  • J. H. Abboud
  • D. R. F. West
  • R. D. Rawlings
Article

Abstract

The laser surface cladding of Ti-Al/TiB2 composites was investigated as a means of producing a functionally gradient material on a commercially pure Ti substrate. Single and double layers were produced. The processing parameters were: 1.7 kW laser power, 3 mm beam diameter, 3–22 mms−1 traverse speeds, 2.2–6.2 g min−1 powder flow rates. The results showed that functionally gradient Ti-Al/TiB2 systems ∼ 2 mm thick, with a progressive increase in the Al content from 0 to 35 wt% Al (50 at % Al) could be produced by vertically overlapping two clad layers using powder mixtures of selected compositions. Microstructural and compositional characterization were performed on single-layer and two-layer clads. Preliminary wear testing carried out on a laser surface Ti-Al/TiB2 single-clad layer and on commercial-purity titanium demonstrated the beneficial effect of laser cladding on the wear resistance.

Keywords

Wear Resistance Powder Mixture Wear Testing Beam Diameter Laser Surface 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • J. H. Abboud
    • 1
  • D. R. F. West
    • 1
  • R. D. Rawlings
    • 1
  1. 1.Department of materialsImperial College of Science, Technology and MedicineLondonUK

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