Fine Porous Structures Fabricated Using Laser Powder Bed Fusion of Ti–6Al–4 V

Salome Sanchez, Ahmad Zafari, Ali Gökhan Demir, Leonardo Caprio, Barbara Previtali, Malgorzata Holynska, Ian Gibson, Davoud Jafari*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

1 Citation (Scopus)

Abstract

This study explores the capability of Laser Powder Bed Fusion (LPBF) to fabricate fine porous Ti–6Al–4V structures for electrochemical applications, specifically for Regenerative Fuel Cells electrodes. High porosity and high surface area are crucial characteristics to maximise electrochemical properties. Therefore, the focus of this study was to produce electrodes by utilising a pulsed wave LPBF system to fabricate thin walls with process-induced stochastic porosity by manipulating process parameters—i.e., duty cycle, laser power and scanning speed. Although the highest porosity was obtained from a duty cycle of 50%, laser power of 100 W and scanning speed of 1500 mm/s, the specimen lacked structural integrity. An increase in duty cycle to 87.5% improved the structural integrity of the thin wall and led to regularly spaced pores. The latter result is promising as it paves the way to controlling the formation and location of pores in LPBF-processed specimens. Overall, this study highlights the capability of LPBF in producing fine porous structures for electrochemical applications.

Original languageEnglish
Title of host publicationAdditive Manufacturing in Multidisciplinary Cooperation and Production
PublisherSpringer Nature
Pages133-143
Number of pages11
ISBN (Electronic)978-3-031-37671-9
ISBN (Print)978-3-031-37670-2
DOIs
Publication statusPublished - 26 Sept 2024

Publication series

NameSpringer Tracts in Additive Manufacturing
VolumePart F3255
ISSN (Print)2730-9576
ISSN (Electronic)2730-9584

Keywords

  • 2024 OA procedure
  • Laser powder bed fusion
  • Porous electrode
  • Ti–6Al–4V
  • Feature resolution

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