The microstructure and mechanical properties of materials produced by wide gap brazing (WGB) and laser beam (LBW) cladding with different blends of Mar M247 and Amdry DF-3 brazing powders were studied. It was shown that LBW Mar M247-based materials comprised of 0.6 to 1 wt % B were weldable. The weld properties were superior to WGB deposits with the same bulk chemical composition, due to the formation of a dendritic structure typical for welded joints, and the precipitation of cuboidal borides of Cr, Mo, and W in the ductile Ni–Cr based matrix. Both materials were found to have useful properties for three-dimensional (3D) additive manufacturing (AM) and repair components manufactured from high gamma prime precipitation hardened superalloys.

Issue Section:
Research Papers
Topics:
Brazing, Cladding systems (Building), Fillers (Materials), Laser beams, Maintenance, Mechanical properties, Precipitation, Superalloys, Temperature, Welded joints, Boron, Particulate matter, Sintering, Heat treating (Metalworking), Metals, Additive manufacturing, Tensile strength, Annealing, High temperature, Precipitation hardening

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