Wet chemical surface functionalization of AA2017 powders for additive manufacturing

Author(s)

Batistao, Bruna Fernanda ; Pinotti, Vitor Eduardo ; Lima, Moyses Leite de ; Rodrigues, Ariano De Giovanni ; Amancio-Filho, Sergio de Traglia ; Gargarella, Piter

• Document type: Journal article
• Source: Powder Technology; v. 443, p. 15-pg., 2024-06-07.

Abstract

Laser Powder Bed Fusion (L-PBF) is an important route for processing aluminum alloys, nevertheless, the high laser reflectivity and thermal conductivity and lower powder flowability of the aluminum alloys remain a challenge for their processing. Aiming to overcome these issues, AA2017 powders were surface-functionalized using chemical etchings. The powders' physical and rheological characterization revealed a decrease in the laser reflectance and an improvement in the flowability of the surface-functionalized powders, when compared to the gas-atomized powder. The higher amount of keyhole porosity in the as-printed L-PBF samples using the surface-functionalized powders also suggests an improvement in the laser absorption of these powders. However, the formation of a thick oxide layer on the surface-functionalized powders led to oxidation porosity in the asprinted samples. Therefore, the chemical etching should be improved to avoid the formation of a thick oxide layer on the powder surface and oxidation porosity in the as-printed L-PBF samples. (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: 22/02760-1 - Surface functionalization of the AA2017 aluminum alloy powder for use in additive manufacturing
• Grantee: Bruna Fernanda Batistão
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 21/13974-0 - High-pressure studies in glass silicates
• Grantee: Ariano De Giovanni Rodrigues
• Support Opportunities: Regular Research Grants