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Coaxial Monitoring of AISI 316L Thin Walls Fabricated by Direct Metal Laser Deposition

Direct metal laser deposition (DMLD) is an additive manufacturing technique suitable for coating and repair, which has been gaining a growing interest in 3D manufacturing applications in recent years. However, its diffusion in the manufacturing industry is still limited due to technical challenges t...

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Autores principales: Errico, Vito, Campanelli, Sabina Luisa, Angelastro, Andrea, Dassisti, Michele, Mazzarisi, Marco, Bonserio, Cesare
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7867166/
https://www.ncbi.nlm.nih.gov/pubmed/33535644
http://dx.doi.org/10.3390/ma14030673
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author Errico, Vito
Campanelli, Sabina Luisa
Angelastro, Andrea
Dassisti, Michele
Mazzarisi, Marco
Bonserio, Cesare
author_facet Errico, Vito
Campanelli, Sabina Luisa
Angelastro, Andrea
Dassisti, Michele
Mazzarisi, Marco
Bonserio, Cesare
author_sort Errico, Vito
collection PubMed
description Direct metal laser deposition (DMLD) is an additive manufacturing technique suitable for coating and repair, which has been gaining a growing interest in 3D manufacturing applications in recent years. However, its diffusion in the manufacturing industry is still limited due to technical challenges to be solved—both the sub-optimal quality of the final parts and the low repeatability of the process make the DMLD inadequate for high-value applications requiring high-performance standards. Thus, real-time monitoring and process control are indispensable requirements for improving the DMLD process. The aim of this study was the optimization of deposition strategies for the fabrication of thin walls in AISI 316L stainless steel. For this purpose, a coaxial monitoring system and image processing algorithms were employed to study the melt pool geometry. The comparison tests carried out highlighted how the region-based active contour algorithm used for image processing is more efficient and stable than others covered in the literature. The results allowed the identification of the best deposition strategy. Therefore, it is shown how this monitoring methodology proved to be suitable for designing and implementing the right building strategy for DMLD manufactured 3D components. A fast and stable image processing method was achieved, which can be considered for future closed-loop monitoring in real-time applications.
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spelling pubmed-78671662021-02-07 Coaxial Monitoring of AISI 316L Thin Walls Fabricated by Direct Metal Laser Deposition Errico, Vito Campanelli, Sabina Luisa Angelastro, Andrea Dassisti, Michele Mazzarisi, Marco Bonserio, Cesare Materials (Basel) Article Direct metal laser deposition (DMLD) is an additive manufacturing technique suitable for coating and repair, which has been gaining a growing interest in 3D manufacturing applications in recent years. However, its diffusion in the manufacturing industry is still limited due to technical challenges to be solved—both the sub-optimal quality of the final parts and the low repeatability of the process make the DMLD inadequate for high-value applications requiring high-performance standards. Thus, real-time monitoring and process control are indispensable requirements for improving the DMLD process. The aim of this study was the optimization of deposition strategies for the fabrication of thin walls in AISI 316L stainless steel. For this purpose, a coaxial monitoring system and image processing algorithms were employed to study the melt pool geometry. The comparison tests carried out highlighted how the region-based active contour algorithm used for image processing is more efficient and stable than others covered in the literature. The results allowed the identification of the best deposition strategy. Therefore, it is shown how this monitoring methodology proved to be suitable for designing and implementing the right building strategy for DMLD manufactured 3D components. A fast and stable image processing method was achieved, which can be considered for future closed-loop monitoring in real-time applications. MDPI 2021-02-01 /pmc/articles/PMC7867166/ /pubmed/33535644 http://dx.doi.org/10.3390/ma14030673 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Errico, Vito
Campanelli, Sabina Luisa
Angelastro, Andrea
Dassisti, Michele
Mazzarisi, Marco
Bonserio, Cesare
Coaxial Monitoring of AISI 316L Thin Walls Fabricated by Direct Metal Laser Deposition
title Coaxial Monitoring of AISI 316L Thin Walls Fabricated by Direct Metal Laser Deposition
title_full Coaxial Monitoring of AISI 316L Thin Walls Fabricated by Direct Metal Laser Deposition
title_fullStr Coaxial Monitoring of AISI 316L Thin Walls Fabricated by Direct Metal Laser Deposition
title_full_unstemmed Coaxial Monitoring of AISI 316L Thin Walls Fabricated by Direct Metal Laser Deposition
title_short Coaxial Monitoring of AISI 316L Thin Walls Fabricated by Direct Metal Laser Deposition
title_sort coaxial monitoring of aisi 316l thin walls fabricated by direct metal laser deposition
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7867166/
https://www.ncbi.nlm.nih.gov/pubmed/33535644
http://dx.doi.org/10.3390/ma14030673
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