Additive manufacturing (AM) is revolutionizing the industrial scenario. Four copper samples have been printed via Laser Powder Bed Fusion (LPBF) at DIAM Laboratory (INFN - Sezione di Padova, Padova, Italy). Samples had different geometrical characteristics, to test the feasibility of the AM as a productive technique for the creation of unsupported copper structures that are characterized by surfaces with a very small inclination angle, where supports cannot be placed. Parts have been printed successfully even in case of 18° of inclination of unsupported walls with respect to the horizontal plane, and on the same samples, surface finishing treatments (performed by Rösler Italiana S.r.l. and INFN-LNL) have been performed to reduce the roughness of the down-facing surfaces. Indeed, the down-skin regions are the most critical areas of AM parts. Several surface treatments are under investigation: mass-finishing treatments (mechanical and chemically assisted mechanical processes), chemical polishing and electropolishing, and for some of them, the results are extremely positive: from an initial roughness (Ra) of 30-35 μm, the treatments allowed us to achieve a Ra value lower than 1 μm. The study here exposed presents a good way to rapidly reduce the roughness of 3D-printed parts, reaching a mirror-like aspect.

Smoothening of the down-skin regions of copper components produced via Laser Powder Bed Fusion technology

Valentina Candela
Writing – Original Draft Preparation
;
Eduard Chyhyrynets
Investigation
;
Silvia Candela
Writing – Review & Editing
;
Giacomo Favero
Writing – Review & Editing
;
Cristian Pira
Supervision
;
Piergiorgio Sonato
Supervision
2022

Abstract

Additive manufacturing (AM) is revolutionizing the industrial scenario. Four copper samples have been printed via Laser Powder Bed Fusion (LPBF) at DIAM Laboratory (INFN - Sezione di Padova, Padova, Italy). Samples had different geometrical characteristics, to test the feasibility of the AM as a productive technique for the creation of unsupported copper structures that are characterized by surfaces with a very small inclination angle, where supports cannot be placed. Parts have been printed successfully even in case of 18° of inclination of unsupported walls with respect to the horizontal plane, and on the same samples, surface finishing treatments (performed by Rösler Italiana S.r.l. and INFN-LNL) have been performed to reduce the roughness of the down-facing surfaces. Indeed, the down-skin regions are the most critical areas of AM parts. Several surface treatments are under investigation: mass-finishing treatments (mechanical and chemically assisted mechanical processes), chemical polishing and electropolishing, and for some of them, the results are extremely positive: from an initial roughness (Ra) of 30-35 μm, the treatments allowed us to achieve a Ra value lower than 1 μm. The study here exposed presents a good way to rapidly reduce the roughness of 3D-printed parts, reaching a mirror-like aspect.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3460635
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