Additive manufacturing of titanium alloy based composites using directed energy deposition: Study of microstructure, mechanical properties and thermal conductivity

• DOI: 10.1016/j.msea.2023.145579
• Publication Date: 2023-08-19T21:24:32Z
• Authors: Ling Chen; Robert Wilson; Geoff de Looze; Kun Yang; Aaron Seeber
• Keywords: Titanium alloy

Titanium (Ti) alloys are widely used in aircraft structures, aero-engines, space infrastructure and biomedical applications. However, their low thermal conductivity limits broader application. In this study, directed energy deposition (DED) was employed for the first to successfully 3D print Ti6Al4V/diamond metal matrix composites (MMCs) with enhanced mechanical strength. By careful control of printing parameters, a high proportion diamond (up 29 wt%) survived laser melting process. The microstructures, phases, density, hardness, compressive strength, elastic modulus, properties were studied. Compared deposited Ti6Al4V alloy, 200% increase at 400 °C achieved by an incorporation nominal 40 wt% diamond. Increases compression strength modulus also found loading up 20 30 respectively reasons these variations explained. These printed improved show potential applications as devices.