Laser Cladding of Ni-Al Bronze for Repairing Marine Components

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Authors
  1. Xue, L.
  2. Chen, J-Y.
  3. Hyatt, C.V.
  4. Islam, M.
Corporate Authors
National Research Council of Canada, Ottawa ONT (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Laser cladding of conventional Ni-Al bronze onto a bronze substrate by using welding wire has been investigated. The laser cladding was conducted with a 3 kW CO2 laser with a simultaneous feeding of the Ni-Al bronze wire into the molten pool. The clad geometry and microstructure depended on the laser processing parameters. With optimized processing conditions, a relatively unfirom and smooth clad layer was obtained. The hardness of clad layer was substantially higher than that of the substrate. The microstructure and composition of laser clad layer was studied with scanning electron microscope (SEM) and energy disperse spectroscopy of x-ray (EDS). The macro and micro stresses of laser clad layer were investigated with x-ray diffraction (XRD) technique. The electrochemical polarization testing in 3.5% NaCl solution showed that the corrosion resistance of laser clad coating was similar to that of the substrate material.
Keywords
Nickel aluminum bronzes;Laser cladding
Report Number
DREA-SR-1999-162-PAP-23 — CONTAINED IN CA000150
Date of publication
01 Oct 1999
Number of Pages
13
DSTKIM No
CA000173
CANDIS No
511897
Format(s):
Hardcopy;Document Image stored on Optical Disk

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