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X-ray Computed Tomography Procedures to Quantitatively Characterize the Morphological Features of Triply Periodic Minimal Surface Structures

Additively manufactured (AM) metallic sheet-based Triply Periodic Minimal Surface Structures (TPMSS) meet several requirements in both bio-medical and engineering fields: Tunable mechanical properties, low sensitivity to manufacturing defects, mechanical stability, and high energy absorption. Howeve...

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Autores principales: Evsevleev, Sergei, Mishurova, Tatiana, Khrapov, Dmitriy, Paveleva, Aleksandra, Meinel, Dietmar, Surmenev, Roman, Surmeneva, Maria, Koptyug, Andrey, Bruno, Giovanni
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8198966/
https://www.ncbi.nlm.nih.gov/pubmed/34206071
http://dx.doi.org/10.3390/ma14113002
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author Evsevleev, Sergei
Mishurova, Tatiana
Khrapov, Dmitriy
Paveleva, Aleksandra
Meinel, Dietmar
Surmenev, Roman
Surmeneva, Maria
Koptyug, Andrey
Bruno, Giovanni
author_facet Evsevleev, Sergei
Mishurova, Tatiana
Khrapov, Dmitriy
Paveleva, Aleksandra
Meinel, Dietmar
Surmenev, Roman
Surmeneva, Maria
Koptyug, Andrey
Bruno, Giovanni
author_sort Evsevleev, Sergei
collection PubMed
description Additively manufactured (AM) metallic sheet-based Triply Periodic Minimal Surface Structures (TPMSS) meet several requirements in both bio-medical and engineering fields: Tunable mechanical properties, low sensitivity to manufacturing defects, mechanical stability, and high energy absorption. However, they also present some challenges related to quality control, which can prevent their successful application. In fact, the optimization of the AM process is impossible without considering structural characteristics as manufacturing accuracy, internal defects, as well as surface topography and roughness. In this study, the quantitative non-destructive analysis of TPMSS manufactured from Ti-6Al-4V alloy by electron beam melting was performed by means of X-ray computed tomography (XCT). Several advanced image analysis workflows are presented to evaluate the effect of build orientation on wall thicknesses distribution, wall degradation, and surface roughness reduction due to the chemical etching of TPMSS. It is shown that the manufacturing accuracy differs for the structural elements printed parallel and orthogonal to the manufactured layers. Different strategies for chemical etching show different powder removal capabilities and both lead to the loss of material and hence the gradient of the wall thickness. This affects the mechanical performance under compression by reduction of the yield stress. The positive effect of the chemical etching is the reduction of the surface roughness, which can potentially improve the fatigue properties of the components. Finally, XCT was used to correlate the amount of retained powder with the pore size of the functionally graded TPMSS, which can further improve the manufacturing process.
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spelling pubmed-81989662021-06-14 X-ray Computed Tomography Procedures to Quantitatively Characterize the Morphological Features of Triply Periodic Minimal Surface Structures Evsevleev, Sergei Mishurova, Tatiana Khrapov, Dmitriy Paveleva, Aleksandra Meinel, Dietmar Surmenev, Roman Surmeneva, Maria Koptyug, Andrey Bruno, Giovanni Materials (Basel) Article Additively manufactured (AM) metallic sheet-based Triply Periodic Minimal Surface Structures (TPMSS) meet several requirements in both bio-medical and engineering fields: Tunable mechanical properties, low sensitivity to manufacturing defects, mechanical stability, and high energy absorption. However, they also present some challenges related to quality control, which can prevent their successful application. In fact, the optimization of the AM process is impossible without considering structural characteristics as manufacturing accuracy, internal defects, as well as surface topography and roughness. In this study, the quantitative non-destructive analysis of TPMSS manufactured from Ti-6Al-4V alloy by electron beam melting was performed by means of X-ray computed tomography (XCT). Several advanced image analysis workflows are presented to evaluate the effect of build orientation on wall thicknesses distribution, wall degradation, and surface roughness reduction due to the chemical etching of TPMSS. It is shown that the manufacturing accuracy differs for the structural elements printed parallel and orthogonal to the manufactured layers. Different strategies for chemical etching show different powder removal capabilities and both lead to the loss of material and hence the gradient of the wall thickness. This affects the mechanical performance under compression by reduction of the yield stress. The positive effect of the chemical etching is the reduction of the surface roughness, which can potentially improve the fatigue properties of the components. Finally, XCT was used to correlate the amount of retained powder with the pore size of the functionally graded TPMSS, which can further improve the manufacturing process. MDPI 2021-06-01 /pmc/articles/PMC8198966/ /pubmed/34206071 http://dx.doi.org/10.3390/ma14113002 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
Evsevleev, Sergei
Mishurova, Tatiana
Khrapov, Dmitriy
Paveleva, Aleksandra
Meinel, Dietmar
Surmenev, Roman
Surmeneva, Maria
Koptyug, Andrey
Bruno, Giovanni
X-ray Computed Tomography Procedures to Quantitatively Characterize the Morphological Features of Triply Periodic Minimal Surface Structures
title X-ray Computed Tomography Procedures to Quantitatively Characterize the Morphological Features of Triply Periodic Minimal Surface Structures
title_full X-ray Computed Tomography Procedures to Quantitatively Characterize the Morphological Features of Triply Periodic Minimal Surface Structures
title_fullStr X-ray Computed Tomography Procedures to Quantitatively Characterize the Morphological Features of Triply Periodic Minimal Surface Structures
title_full_unstemmed X-ray Computed Tomography Procedures to Quantitatively Characterize the Morphological Features of Triply Periodic Minimal Surface Structures
title_short X-ray Computed Tomography Procedures to Quantitatively Characterize the Morphological Features of Triply Periodic Minimal Surface Structures
title_sort x-ray computed tomography procedures to quantitatively characterize the morphological features of triply periodic minimal surface structures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8198966/
https://www.ncbi.nlm.nih.gov/pubmed/34206071
http://dx.doi.org/10.3390/ma14113002
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