Experimental Investigation of Spreadability of Metal Powders in Recoating Process

Aurelien Neveu, Naveen Mani Tripathi, Oliver Rigo, Filip Francqui, Geoffroy Lumay

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Metallic fine powders are widely used in many additive manufacturing (AM) industries. To control and optimize processing methods, powders must be precisely characterized either based on grain properties or behavior of bulk powder. In this research, we will focus on powder spreadability in Selective Laser Melting (SLM) process, which is a kind of bulk powder behavior. Three metallic powders (Nickel and Aluminium alloy) are studied. Powders spreadability is determined with the GranuDrum, a rotating drum enabling to quantify the influence of cohesion, shear-thinning/thickening as well as thixotropic behavior. It allows to assess the powder spreadability without applying compressive load during the powder testing what fits with the conditions seen by powders in AM processes. These measurements are correlated to powder performance in 3D printer, where a CCD camera is used to take several snapshots of powder bed. Two different recoater wipers and two recoating speeds (30 and 160mm/s) are explored.

Original languageEnglish
Title of host publicationProceedings - Euro PM2020 Congress and Exhibition
PublisherEuropean Powder Metallurgy Association (EPMA)
ISBN (Electronic)9781899072514
StatePublished - 1 Jan 2020
Externally publishedYes
EventEuropean Powder Metallurgy Congress and Exhibition, Euro PM 2020 - Virtual, Online
Duration: 5 Oct 20207 Oct 2020

Publication series

NameProceedings - Euro PM2020 Congress and Exhibition

Conference

ConferenceEuropean Powder Metallurgy Congress and Exhibition, Euro PM 2020
CityVirtual, Online
Period5/10/207/10/20

Keywords

  • Additive manufacturing
  • Cohesive index
  • Experimental
  • Recoating
  • Rotating drum
  • Spreadability

ASJC Scopus subject areas

  • Mechanics of Materials
  • Metals and Alloys

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