Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Scratch Resistance of a Plasma-Assisted Duplex Treated 17–4 Ph Stainless Steel Additively Manufactured by Laser Powder Bed Fusion

Arturo Gómez-Ortega
ORCID logo ,
Julián Andrés Pinilla-Bedoya
,
Carolina Ortega-Portilla
ORCID logo ,
Christian Félix-Martínez
ORCID logo ,
Guillermo César Mondragón-Rodríguez
,
Diego Germán Espinosa Arbeláez
,
James Pérez-Barrera
,
Juan Manuel González-Carmona
* ,
Edgar Adrián Franco Urquiza
ORCID logo
Version 1 : Received: 25 March 2024 / Approved: 26 March 2024 / Online: 26 March 2024 (06:50:19 CET)

How to cite: Gómez-Ortega, A.; Pinilla-Bedoya, J.A.; Ortega-Portilla, C.; Félix-Martínez, C.; Mondragón-Rodríguez, G.C.; Espinosa Arbeláez, D.G.; Pérez-Barrera, J.; González-Carmona, J.M.; Franco Urquiza, E.A. Scratch Resistance of a Plasma-Assisted Duplex Treated 17–4 Ph Stainless Steel Additively Manufactured by Laser Powder Bed Fusion. Preprints 2024, 2024031517. https://doi.org/10.20944/preprints202403.1517.v1 Gómez-Ortega, A.; Pinilla-Bedoya, J.A.; Ortega-Portilla, C.; Félix-Martínez, C.; Mondragón-Rodríguez, G.C.; Espinosa Arbeláez, D.G.; Pérez-Barrera, J.; González-Carmona, J.M.; Franco Urquiza, E.A. Scratch Resistance of a Plasma-Assisted Duplex Treated 17–4 Ph Stainless Steel Additively Manufactured by Laser Powder Bed Fusion. Preprints 2024, 2024031517. https://doi.org/10.20944/preprints202403.1517.v1

Abstract

Additive manufacturing (AM) or 3D printing of metals is gaining popularity due to its flexibility in fabricating parts with highly complex designs, as well as simplifying manufacturing steps and optimizing process times. In this investigation, 17-4 PH stainless steel was additively manufactured using Laser-Powder Bed Fusion (L-PBF), followed by functionalization through a DUPLEX treatment. This treatment involved a plasma-assisted nitriding process, followed by deposition of an arc-PVD c-Al0.7Cr0.3N hard coating. The microstructural modifications resulting from plasma nitriding (such as the formation of Fe2,3N and Fe4N, and the αN or expanded martensite phases), and the surface improvements with the c-Al0.7Cr0.3N coating on the 3D-printed 17-4 PH steel, are evaluated in comparison to conventionally manufactured 17-4 PH steel. These microstructural characteristics are correlated with the mechanical response of the treated surfaces. As a result of the plasma nitriding process, the hardness of the 3D-printed 17-4 PH SS increased by approximately 260%. The wear, measured through dynamic and static scratch-testing, was reduced by approximately 31%. This improvement was attributed to the modification of adhesive failure mechanisms, leading to a reduction in wear volume, improved coating adhesion, and enhanced scratch resistance.

Keywords

17-4 PH stainless steel; additive manufacturing; DUPLEX treatment; hardness; scratch resistance

Subject

Engineering, Metallurgy and Metallurgical Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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