Laser Deposition of Ti-6Al-4V Wire with WC Powder for Functionally Graded Components

Abstract

In this study, metal matrix ceramic (MMC) functionally graded components are fabricated using a method based upon shape metal deposition. Laser deposition provides a suitable means for metallic coating and surface alloying for many applications. New functionally graded components can be built with surface and bulk properties locally modified. Tailoring to meet location specific demands such as modified tribological, corrosion, and thermal properties is achievable. This article investigates the cladding of Ti-6Al-4V wire and WC powder concurrently fed into the laser generated melt pool on a Ti-6Al-4V substrate. The addition of WC particles promotes its hardness and improves wear resistance. Results obtained showed the micrograph of the functionally graded area coating of Ti-6Al-4V/WC matrix in which WC particles are dissolved resulting in TiC/W two phase nodules. Scanning electron microscope (SEM), energy dispersive X-ray (EDX), X-ray diffraction (XRD), and microhardness characterization is presented for the coating. Fiber laser deposition is demonstrated as a means to produce titanium matrix ceramic composite structures with a demonstrator part is presented.