LASER WELD CLADDING OF NICKEL ALUMINUM BRONZES

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Authors
  1. Hyatt, C.V.
  2. Magee, K.H.
  3. Hewitt, J.
  4. Betancourt, T.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Procedures for laser cladding nickel aluminum bronzes have been developed and the resulting clad surfaces have been evaluated. A low heat input (400-1200 J/cm) cladding process, which used a specially developed fine wire feeder, and a highheat input laser cladding process which used commercial welding wire, were used. The microstructures produced in this work depended on processing method and conditions, and on material composition. At the lowest heat inputs, deposits were largely martensite. As heat input increased, Widmanstaetten and grain boudnary alpha were also observed, as were transformations in the interpass heat affected zones. Experiments indicated laser cladding gives an improvement in resistance cavitation-erosion in seawater. Laser cladding of a number of ship components with complex shapes illustrated the practicality of the process.
Report Number
DREA-NAMT-95-3-PAP-2 — CONTAINED IN 99-00779
Date of publication
30 May 1995
Number of Pages
27
DSTKIM No
99-00792
CANDIS No
510356
Format(s):
Hardcopy;Document Image stored on Optical Disk

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