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Spreadability of Metal Powders for Laser-Powder Bed Fusion via Simple Image Processing Steps
This paper investigates the spreadability of the spherical CoCrWMo powder for laser- powder bed fusion (PBF-LB) by using image processing algorithms coded in MATLAB. Besides, it also aims to examine the spreadability dependence with the other characteristics such as powder size distribution, apparen...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8746019/ https://www.ncbi.nlm.nih.gov/pubmed/35009353 http://dx.doi.org/10.3390/ma15010205 |
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author | Vakifahmetoglu, Cekdar Hasdemir, Beyza Biasetto, Lisa |
author_facet | Vakifahmetoglu, Cekdar Hasdemir, Beyza Biasetto, Lisa |
author_sort | Vakifahmetoglu, Cekdar |
collection | PubMed |
description | This paper investigates the spreadability of the spherical CoCrWMo powder for laser- powder bed fusion (PBF-LB) by using image processing algorithms coded in MATLAB. Besides, it also aims to examine the spreadability dependence with the other characteristics such as powder size distribution, apparent density, angle of repose. Powder blends in four different particle size distributions are prepared, characterized, and spreadability tests are performed with the PBF-LB. The results demonstrate that an increase in fine particle ratio by volume (below 10 µm) enhances the agglomeration and decreases the flowability, causing poor spreadability. These irregularities on the spread layers are quantified with simple illumination invariant analysis. A clear relation between powder spreadability and 3D printed structures properties in terms of residual porosity could not be defined since structural defects in 3D printed parts also depends on other processing parameters such as spatter formation or powder size over layer height ratio. |
format | Online Article Text |
id | pubmed-8746019 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-87460192022-01-11 Spreadability of Metal Powders for Laser-Powder Bed Fusion via Simple Image Processing Steps Vakifahmetoglu, Cekdar Hasdemir, Beyza Biasetto, Lisa Materials (Basel) Article This paper investigates the spreadability of the spherical CoCrWMo powder for laser- powder bed fusion (PBF-LB) by using image processing algorithms coded in MATLAB. Besides, it also aims to examine the spreadability dependence with the other characteristics such as powder size distribution, apparent density, angle of repose. Powder blends in four different particle size distributions are prepared, characterized, and spreadability tests are performed with the PBF-LB. The results demonstrate that an increase in fine particle ratio by volume (below 10 µm) enhances the agglomeration and decreases the flowability, causing poor spreadability. These irregularities on the spread layers are quantified with simple illumination invariant analysis. A clear relation between powder spreadability and 3D printed structures properties in terms of residual porosity could not be defined since structural defects in 3D printed parts also depends on other processing parameters such as spatter formation or powder size over layer height ratio. MDPI 2021-12-28 /pmc/articles/PMC8746019/ /pubmed/35009353 http://dx.doi.org/10.3390/ma15010205 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Vakifahmetoglu, Cekdar Hasdemir, Beyza Biasetto, Lisa Spreadability of Metal Powders for Laser-Powder Bed Fusion via Simple Image Processing Steps |
title | Spreadability of Metal Powders for Laser-Powder Bed Fusion via Simple Image Processing Steps |
title_full | Spreadability of Metal Powders for Laser-Powder Bed Fusion via Simple Image Processing Steps |
title_fullStr | Spreadability of Metal Powders for Laser-Powder Bed Fusion via Simple Image Processing Steps |
title_full_unstemmed | Spreadability of Metal Powders for Laser-Powder Bed Fusion via Simple Image Processing Steps |
title_short | Spreadability of Metal Powders for Laser-Powder Bed Fusion via Simple Image Processing Steps |
title_sort | spreadability of metal powders for laser-powder bed fusion via simple image processing steps |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8746019/ https://www.ncbi.nlm.nih.gov/pubmed/35009353 http://dx.doi.org/10.3390/ma15010205 |
work_keys_str_mv | AT vakifahmetoglucekdar spreadabilityofmetalpowdersforlaserpowderbedfusionviasimpleimageprocessingsteps AT hasdemirbeyza spreadabilityofmetalpowdersforlaserpowderbedfusionviasimpleimageprocessingsteps AT biasettolisa spreadabilityofmetalpowdersforlaserpowderbedfusionviasimpleimageprocessingsteps |