Microstructure and Properties of Laser-Deposited Ti6Al4V Metal Matrix Composites Using Ni-Coated Powder

Abstract

As a layer additive rapid manufacturing process, laser engineered net shaping (LENS) can fabricate three-dimensional components directly from a computer-aided design (CAD) model. In this work, the LENS process was employed to fabricate Ti6Al4V metal matrix composites using powder mixtures of gas-atomized Ti6Al4V powder and varying volume fractions of Ni nanocoated TiC particles. The as-fabricated microstructures were studied using scanning electron microscopy (SEM), X-ray energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), differential thermal analyzer (DTA), and transmission electron microscopy (TEM) techniques. The interfaces between the metal matrix and ceramic particles were examined. The presence of intermetallic phases and resolidified TiC particles was rationalized on the basis of the thermal field during deposition. The influence of LENS parameters on the microstructure evolution and mechanical behavior of the metal matrix composites (MMCs) was also discussed.

Laser additive manufacturing of ultrafine TiC particle reinforced Inconel 625 based composite parts: Tailored microstructures and enhanced performance

“…Both theoretical and experiential researches have been carried out to study the thermal behavior of LENS process and the mechanisms for the development of microstructural and mechanical properties of LENS-processed composites. Lavernia et al [24,25] have deposited IN625-based and Ti6Al4V-based MMCs using LENS with Ni-coated TiC reinforcement particles. The integrity of the interface between matrix and TiC particles and the mechanical properties of LENS-deposited MMCs are generally improved effectively by using Ni-coated TiC particles.…”

Design for additive manufacturing of composite materials and potential alloys: a review

“…Due to the formation of either larger-sized pore chains or interlayer micro-pores within insufficient laser energy density, the densification response was limited. magnification micrograph for LENSdeposited Ti6Al4V + 20 wt.% TiC/Ni is given in Figure 11b respectively [48]. In term of ceramic nanocomposites, high solid content and stable processing conditions are prerequisites of ceramic production technology.…”

Densification, Microstructure, and Wear Property of In Situ Titanium Nitride-Reinforced Titanium Silicide Matrix Composites Prepared by a Novel Selective Laser Melting Process

“…Selective laser melting (SLM), as a newly developed rapid prototyping (RP) technique, [18][19][20][21][22] has the capability to fabricate three-dimensional parts with any complex configurations directly from powder materials. [23][24][25][26] SLM creates fully dense parts in a layerby-layer manner by selectively fusing and consolidating thin layers of loose powder using a high-energy laser beam, without any postprocessing requirements.…”