Progress toward increased powder quality for additive manufacturing by gas atomization

Iver E. Anderson, Bo Kong, Emma M.H. White, Timothy E. Prost, Jordan A. Tiarks, Trevor R. Riedemann, David J. Byrd, Ross D. Anderson

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

1 Scopus citations

Abstract

Close-coupled gas atomization (CC-GA) has great potential for enhanced industrial-scale production of pre-alloyed powder with top quality for additive manufacturing (AM). However, there is a need for powder “satellite” reduction to promote sphericity and flowability, particularly in coarser powders with a reduced cooling rate that are prone to “welded” attachment of finer powders in the turbulent environment of an atomizer. Coarser GA powders also may have excess interior gas porosity that is not eliminated during melting and cannot be healed by post-build hot isostatic pressing. Various strategies have been developed to address these powder quality issues including macro-flow modeling and experimental testing/observations of atomizer spray chamber modifications and droplet breakup modeling and experimental atomization gas flow energy adjustments and resulting porosity analysis. Results are reported to show progress in gas atomization process research to mitigate these issues for Ni and Ni-based alloy powders.

Original languageEnglish
Title of host publicationAdvances in Powder Metallurgy and Particulate Materials - 2018
Subtitle of host publicationProceedings of the 2018 International Conference on Powder Metallurgy and Particulate Material, POWDERMET 2018
PublisherMetal Powder Industries Federation
Pages164-182
Number of pages19
ISBN (Electronic)9781943694181
StatePublished - 2018
Externally publishedYes
Event2018 International Conference on Powder Metallurgy and Particulate Material, POWDERMET 2018 - San Antonio, United States
Duration: 17 Jun 201820 Jun 2018

Publication series

NameAdvances in Powder Metallurgy and Particulate Materials - 2018: Proceedings of the 2018 International Conference on Powder Metallurgy and Particulate Material, POWDERMET 2018
Volume2018-June

Conference

Conference2018 International Conference on Powder Metallurgy and Particulate Material, POWDERMET 2018
CountryUnited States
CitySan Antonio
Period17/06/1820/06/18

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