The ageing response of direct laser deposited metastable β-Ti alloy, Ti–5Al–5Mo–5V–3Cr

Deepak Sharma, Sitarama Raju Kada, Daniel Fabijanic, David Parfitt, Bo Chen, Bryan Roebuck, Michael E. Fitzpatrick, Matthew Robert Barnett

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14 Citations (Scopus)
25 Downloads (Pure)


The formation of solely β-phase titanium after direct laser deposition (DLD) of metastable β-Ti alloy does not provide the desired properties. Hence, we present a study into the ageing response of DLD built Ti-5553 β-Ti alloy to obtain the bimodal (β + α) microstructure providing improved properties. The results obtained from the heat treatments showed that a unique microstructure with refined intragranular and discontinuous grain boundary α-phase can be obtained by directly ageing (using fast heating rate) the as-built samples at the ageing condition (600 °C + 0.5 h). This microstructure produced a good balance in mechanical properties (UTS = 1345 ± 5 MPa and δ = 11.6 ± 0.5%). The interparticle spacing between the α-phase (d) showed a correlation with microhardness (Hv=340+158/√d) and yield stress (σ0.2=870+15086/√d) values for all the aged samples.

Original languageEnglish
Article number102384
JournalAdditive Manufacturing
Issue numberPart A
Early online date4 Oct 2021
Publication statusPublished - 1 Dec 2021

Bibliographical note

Funding Information:
MEF is grateful for funding from the Lloyd’s Register Foundation (LRF), UK a charitable foundation helping to protect life and property by supporting engineering-related education, public engagement and the application of research.

Publisher Copyright:
© 2021 Elsevier B.V.


  • Direct laser deposition
  • Microstructure-property relationship
  • Single and duplex aging
  • Titanium alloys

ASJC Scopus subject areas

  • Biomedical Engineering
  • Materials Science(all)
  • Engineering (miscellaneous)
  • Industrial and Manufacturing Engineering


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