Abstract
Waspaloy is used extensively in gas turbine engines. Although several techniques exist for depositing Waspaloy claddings or coatings such as gas tungsten arc welding (GTAW) or low pressure plasma spray (LPPS), little work has been performed on laser cladding or high velocity oxygen fuel (HVOF) spraying of this material. Advantages of these techniques include penetration to the substrate and thinner (250–500 micrometers) deposits. This study involved characterizing the microstructure and properties of Waspaloy coatings deposited using laser cladding and HVOF spraying. It was found that totally dense, metallurgically bonded coatings having properties similar to the base metal could be formed. Proper control of process parameters avoids thermal damage to the Waspaloy base. It is felt that such coatings can offer viable restoration schemes on worn or mis-machined components.
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