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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Physical Characterization and Rheological Behavior of AA 2017 Powder Modified with Al-5.0Nb-0.5B Inoculant Powder for Laser-based Powder Bed Fusion

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Author(s):
Pamela Karina dos Santos Bomfim [1] ; Bruna Fernanda Batistão [2] ; Flavia Costa da Silva ; Vitor Eduardo Pinotti [4] ; Moyses Leite de Lima [5] ; Francisco Gil Coury ; Piter Gargarella
Total Authors: 7
Affiliation:
[1] Universidade Federal de São Carlos. Programa de Pós-Graduação em Ciência e Engenharia de Materiais - Brasil
[2] Universidade Federal de São Carlos. Programa de Pós-Graduação em Ciência e Engenharia de Materiais - Brasil
[4] Universidade Federal de São Carlos. Programa de Pós-Graduação em Ciência e Engenharia de Materiais - Brasil
[5] Instituto de Pesquisas Tecnológicas. Laboratório de Processos Metalúrgicos - Brasil
Total Affiliations: 7
Document type: Journal article
Source: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 27, 2024-03-25.
Abstract

Blending finer powders of Ti, Zr, Ta, Sc, and Nb compounds as inoculants have been a promising strategy to modify precipitation-hardened aluminum alloys for laser-based powder bed fusion, promoting a crack-free equiaxed microstructure. However, there is still a lack of comprehensive understanding of the influence of these fine Al-Nb-B inoculant particles on the AA 2017 powder's physical characteristics and flowability during the process. The results indicate that blended powder has a similar PSD to AA 2017 powder. Furthermore, the circularity, smoothness, and morphology of the particles indicate that both inoculant and AA2017 powders do not exhibit high sphericity, but the blended powder showed slightly more agglomerated particles. Regarding rheological properties, it was observed that a higher flow energy was required to move the blended powder in unconfined conditions compared to the AA 2017 powder. Additionally, the blended powder exhibited higher compressibility and tendency to retain air in packed conditions during the deposition and spreading process. In conclusion, the physical characterization techniques combined with rheological tests have proven to be a rapid and reliable approach for assessing the impact of the finer inoculant particles' characteristics on the laser-based powder bed fusion. (AU)

FAPESP's process: 20/09544-7 - Surface functionalization of AA2017 powder for additive manufacturing
Grantee:Bruna Fernanda Batistão
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 22/05528-2 - Additive Manufacturing of layered metal composites with soft magnetic properties
Grantee:Vitor Eduardo Pinotti
Support Opportunities: Scholarships in Brazil - Doctorate
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: 19/13715-4 - Studies of the process variables in the inert gas atomization in the production of metal powders for DED - Direct Energy Deposition and PBD - Powder Bed Deposition
Grantee:Flávia Costa da Silva
Support Opportunities: Scholarships in Brazil - Post-Doctoral