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September 12, 2025

Comparison Of Centrifugal And Gas Atomized Type 17-4PH Powders In Laser Powder Bed Fusion And Directed Energy Deposition Applications

MHM.C. HashArgonne National Laboratory FGFriedrich M. GötzUniversity of British Columbia PAPaul Abram

Key Points

Centrifugal type 17-4PH powders produced comparable print quality and speed in both LPBF and DED methods.
Particle sizes of 15-53 micron and 53-106 micron were used, leading to insights into density, porosity, and mechanical properties.
Commercial gas atomized powders served as a benchmark, enabling a direct performance comparison with the centrifugal powders.
Data analysis pointed out the distinct advantages and limitations associated with the manufacturing methods of the powders.

Abstract

Fine, Type 17-4PH powders made by centrifugal were employed in both Laser Powder Bed Fusion (LPBF) and Directed Energy Deposition (DED) applications. Powders at a nominal, particle size ranges of 15-53 or 53-106 micron were used to print LPBF and DED test specimens comparing print quality and speed. Finished parts were characterized for final density, porosity, feature resolution, print consistency, and mechanical properties. Comparable specimens made using commercial, gas atomized powders were printed in parallel to provide baseline levels of performance for comparison. Resulting data and microscopy are presented and discussed with respect to powder manufacturing method describing benefits and limitations of these powders.

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