Enhancement of powder supply efficiency in directed energy deposition based on gas-solid multiphase-flow simulation

Ryo Koike, Shiho Takemura, Yasuhiro Kakinuma, Masaki Kondo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Directed energy deposition is an additive manufacturing process which produces deposits by irradiating laser beam on the baseplate and supplying material powder to the meltpool. Although the material powder is generally conveyed with carrier-gas flow, the powders diffuse and some of them do not reach to the meltpool. In order to suppress the waste of materials, the particle movement should be analyzed and modified not only from the viewpoint of deposition conditions but also the nozzle design. Against this background, this paper presents analytical and measurement results of powder distribution under the nozzle and proposes a nozzle design to reduce the waste of material powder based on a gas-solid multiphase-flow simulation. The experimental result of designed nozzle certainly shows high powder supply efficiency of 74.8%, whereas that of the conventional nozzle is 52.6%.

Original languageEnglish
Title of host publication6th CIRP Global Web Conference, CIRPe 2018
Subtitle of host publicationEnvisaging the Future Manufacturing, Design, Technologies and Systems in Innovation Era
EditorsAlessandro Simeone, Paolo C. Priarone
PublisherElsevier B.V.
Pages133-137
Number of pages5
Volume78
ISBN (Electronic)9781510875692
DOIs
Publication statusPublished - 2018 Jan 1
Event6th CIRP Global Web Conference, CIRPe 2018 -
Duration: 2018 Oct 232018 Oct 25

Other

Other6th CIRP Global Web Conference, CIRPe 2018
Period18/10/2318/10/25

Keywords

  • Additive manufacturing
  • laser
  • simulation

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering

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  • Cite this

    Koike, R., Takemura, S., Kakinuma, Y., & Kondo, M. (2018). Enhancement of powder supply efficiency in directed energy deposition based on gas-solid multiphase-flow simulation. In A. Simeone, & P. C. Priarone (Eds.), 6th CIRP Global Web Conference, CIRPe 2018: Envisaging the Future Manufacturing, Design, Technologies and Systems in Innovation Era (Vol. 78, pp. 133-137). Elsevier B.V.. https://doi.org/10.1016/j.procir.2018.09.061