In the present work, laser direct deposition was used to build multi-layer structures of nickel-based alloy Inconel 690 reinforced with titanium carbide particles at 18.4%, 27.2%, and 40.0% by volume. Optical and electron microscopy of sectioned specimens revealed uniform distribution of titanium carbide particles throughout the multi-layer depositions and a near absence of internal voids. The ratios of Inconel 690 to TiC in the depositions matched the levels in the initial powder mixtures. The presence of carbide particles coincided with refinement of matrix microstructure and introduction of a finely dispersed crystalline phase. High-temperature dissolution of titanium carbide was not detected.
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