Effect of postprocessing thermal treatments on electron- beam powder bed–fused Ti6Al4V

Gowtham Soundarapandiyan, Raja H.U. Khan, Carol Johnston, Bo Chen, Michael Fitzpatrick

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Electron-beam powder-bed-fusion additive manufacturing was used to build Ti6Al4V blocks. Postfabrication thermal treatments were applied to modify the mechanical properties. The postfabrication treatments included hot isostatic pressing and solution treatment and ageing. The microstructure and mechani- cal properties of the as-built and postthermally treated material were characterised. The postfabrication treatments were found to be effective in homogenising the microstructure and reducing the number of defects/pores, which improved the material Charpy impact toughness and fatigue life with some reduction in the material's strength. Based on the present results, as well as data from previous literature studies, the reduction in material strength after the postthermal treatment is likely to be caused by the combined effect of α-lath coarsening and the low oxygen content of the powder feedstock.
Original languageEnglish
Article numbere168
Number of pages8
JournalMaterial Design & Processing Communications
Issue number3
Early online date26 Feb 2020
Publication statusPublished - Jun 2021

Bibliographical note

free access


EPSRC Fellowship EP/R043973/1 awarded to Bo Chen is acknowledged to facilitate this research collaboration.


  • Additive manufacture
  • Ti6Al4V Alloy
  • Electron beam melting
  • hot isostatic pressing
  • mechanical characteristics
  • Microstructure
  • additive manufacturing
  • microstructure
  • electron beam melting
  • mechanical properties
  • Ti6Al4V

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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