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Gas atomization of A2 tool steel: Effect of process parameters on powders' physical properties

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Author(s):
Mathias, Laura E. T. ; Andreoli, Angelo F. ; Gargarella, Piter
Total Authors: 3
Document type: Journal article
Source: Journal of Alloys and Compounds; v. 960, p. 9-pg., 2023-06-04.
Abstract

In this study, powders of the A2 tool steel were produced by close-coupled gas atomization using argon gas aiming their use in additive manufacturing (AM) technologies. The effects of melt overheating and gas atomization pressure on their physical properties were analyzed. The powders were separated into different particle size ranges, and a complete morphological characterization was carried out. The effect of back pressure was verified due to a substantial increase in the gas-to-melt mass flow rates ratio (GMR) with increasing gas pressure. Atomization gas pressure showed a slightly more significant influence on particle size distribution; however, the melt overheating effect was also significant. As the GMR increases, the median particle size decreases to a certain threshold. Above this, particle size cannot be considerably re-duced with increasing GMR.& COPY; 2023 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 17/27031-4 - Effect of process parameters on the metallurgical characteristics of additive-manufactured alloys
Grantee:Piter Gargarella
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 21/12056-7 - Soft magnetic composites produced by additive manufacturing
Grantee:Angelo Fernandes Andreoli
Support Opportunities: Scholarships in Brazil - Post-Doctoral