Stabilization of metal structure formation in directed energy deposition by applying a coolant system

Ryo Koike, Luca Pagano, Yasuhiro Kakinuma, Yohei Oda, Masaki Kondo

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


Directed energy deposition (DED), which is one of additive manufacturing processes applicable to metals, is suitable to produce a large-scale complex-shaped part in aerospace and automobile industries. However, mechanical characteristics in a DED-produced part often varies according to the thermal conduction at each deposition point. To ensure quality uniformity in a DED-produced part, a cooling process also should be actively performed to control the thermal condition. This study evaluates variation in crystal structure in parts produced with DED applying a coolant system. By performing the cooling process at certain intervals during deposition, the variations in Vickers hardness and crystal structure are effectively suppressed in DED of Inconel 625.

Original languageEnglish
Pages (from-to)38-44
Number of pages7
JournalProcedia Manufacturing
Publication statusPublished - 2019
Event19th Machining Innovations Conference for Aerospace Industry, MIC 2019 - Garbsen, Germany
Duration: 2019 Nov 272019 Nov 28


  • Coolant
  • Directed energy deposition
  • Heat treatment
  • Inconel 625

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Artificial Intelligence


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