Toward Control of Microstructure in Microscale Additive Manufacturing of Copper Using Localized Electrodeposition

Soheil Daryadel, Ali Behroozfar, Majid Minary-Jolandan

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The progress in microscale additive manufacturing (μ-AM) of metals requires engineering of the microstructure for various functional applications. In particular, achieving in situ control over the microstructure during 3D printing is critical to eliminate the need for post-processing and annealing. Recent reports have demonstrated the possibility of electrochemical μ-AM of nanotwinned metals, in which the presence of parallel arrays of twin boundaries (TBs) are known to enhance mechanical and electrical properties. For the first time, the authors report that the microstructure of metals printed using the microscale localized pulsed electrodeposition (L-PED) process can be controlled in situ during 3D-printing. In particular, the authors show that through electrochemical process parameters the density and the orientation of the TBs, as well as the grain size can be controlled. The results of the in situ SEM microcompression experiments on directly 3D-printed micro-pillars show that such control over microstructure directly correlates with the mechanical properties of the printed metal.

Original languageEnglish (US)
Article number1800946
JournalAdvanced Engineering Materials
Volume21
Issue number1
DOIs
StatePublished - Jan 2019
Externally publishedYes

Keywords

  • localized electrodeposition (LED)
  • micro-scale additive manufacturing (μ-AM) of metals
  • microstructural control
  • nanotwinned metals

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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