Variation of optimal gas-supply condition along with deposition height in directed energy deposition

Shiho Takemura, Ryo Koike, Yasuhiro Kakinuma, Yohei Oda

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

Abstract

Summary. Directed energy deposition (DED), which is one of additive manufacturing applicable to metals, laminates the material on a baseplate by melting and solidifying with a high-power heat source. In terms of powder-based DED, the material waste tends to be large because powder flow is difficult to converge on the melt pool precisely. This study evaluates the variation in powder distribution when the deposition height is changed in order to obtain the optimal gas-flow rate and powder-nozzle shape. The powder flow is estimated with a computational fluid dynamics simulation based on Euler-Lagrange approach. The simulation results indicate that the proposed nozzles can achieve the high powder convergence stably even if the total amount of gas supply is reduced.

Original languageEnglish
Title of host publication2nd International Conference on Simulation for Additive Manufacturing, Sim-AM 2019
EditorsFerdinando Auricchio, E. Rank, P. Steinmann, S. Kollmannsberger, Simone Morganti
PublisherInternational Center for Numerical Methods in Engineering
Pages456-466
Number of pages11
ISBN (Electronic)9788494919480
Publication statusPublished - 2019
Event2nd International Conference on Simulation for Additive Manufacturing, Sim-AM 2019 - Pavia, Italy
Duration: 2019 Sep 112019 Sep 13

Publication series

Name2nd International Conference on Simulation for Additive Manufacturing, Sim-AM 2019

Conference

Conference2nd International Conference on Simulation for Additive Manufacturing, Sim-AM 2019
Country/TerritoryItaly
CityPavia
Period19/9/1119/9/13

Keywords

  • Computational Fluid Dynamics
  • Directed Energy Deposition
  • Inconel 625
  • Multiphase-flow Simulation

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

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