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6CCVD Research

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

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2023-08-19
JournalMaterials Science and Engineering A
AuthorsLing Chen, Robert Wilson, Geoff de Looze, Kun Yang, Aaron Seeber
InstitutionsCSIRO Manufacturing
Citations18

Abstract

Section titled ā€œAbstractā€

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

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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  2. 1992 - Metal and intermetallic-matrix composites for aerospace propulsion and power systems
  3. 2016 - Understanding the effect of laser scan strategy on residual stress in selective laser melting through thermo-mechanical simulation
  4. 2008 - Low temperature thermal conductivity of Ti6Al4V alloy [Crossref]
  5. 2019 - Applications of titanium in the electronic industry.ā€
  6. 2015 - Rapid and low temperature spark plasma sintering synthesis of novel carbon nanotube reinforced titanium matrix composites [Crossref]
  7. 2023 - Thermal conductivity and microstructure of graphite flakes reinforced titanium matrix composites fabricated by spark plasma sintering [Crossref]
  8. 2016 - Thermal and mechanical properties of graphene-titanium composites synthesized by microwave sintering [Crossref]
  9. 2014 - Effect of titanium addition on the thermal properties of diamond/Cu-Ti composites fabricated by pressureless liquid-phase sintering technique
  10. 2015 - Mechanical properties of diamond/Al composites with Ti-coated diamond particles produced by gas-assisted pressure infiltration [Crossref]

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