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Anisotropy of Mechanical Properties and Residual Stress in Additively Manufactured 316L Specimens

In the presented study, LPBF 316L stainless steel tensile specimens were manufactured in three different orientations for the analysis of anisotropy. The first set of specimens was built vertically on the build platform, and two other sets were oriented horizontally perpendicular to each other. Tens...

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Autores principales: Fedorenko, Alexey, Fedulov, Boris, Kuzminova, Yulia, Evlashin, Stanislav, Staroverov, Oleg, Tretyakov, Mikhail, Lomakin, Evgeny, Akhatov, Iskander
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658429/
https://www.ncbi.nlm.nih.gov/pubmed/34885332
http://dx.doi.org/10.3390/ma14237176
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author Fedorenko, Alexey
Fedulov, Boris
Kuzminova, Yulia
Evlashin, Stanislav
Staroverov, Oleg
Tretyakov, Mikhail
Lomakin, Evgeny
Akhatov, Iskander
author_facet Fedorenko, Alexey
Fedulov, Boris
Kuzminova, Yulia
Evlashin, Stanislav
Staroverov, Oleg
Tretyakov, Mikhail
Lomakin, Evgeny
Akhatov, Iskander
author_sort Fedorenko, Alexey
collection PubMed
description In the presented study, LPBF 316L stainless steel tensile specimens were manufactured in three different orientations for the analysis of anisotropy. The first set of specimens was built vertically on the build platform, and two other sets were oriented horizontally perpendicular to each other. Tensile test results show that mean Young’s modulus of vertically built specimens is significantly less then horizontal ones (158.7 GPa versus 198 GPa), as well as yield strength and elongation. A role of residual stress in a deviation of tensile loading diagrams is investigated as a possible explanation. Simulation of the build process on the basis of ABAQUS FEA software was used to predict residual stress in 316L cylindrical specimens. Virtual tensile test results show that residual stress affects the initial stage of the loading curve with a tendency to reduce apparent Young’s modulus, measured according to standard mechanical test methods.
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spelling pubmed-86584292021-12-10 Anisotropy of Mechanical Properties and Residual Stress in Additively Manufactured 316L Specimens Fedorenko, Alexey Fedulov, Boris Kuzminova, Yulia Evlashin, Stanislav Staroverov, Oleg Tretyakov, Mikhail Lomakin, Evgeny Akhatov, Iskander Materials (Basel) Article In the presented study, LPBF 316L stainless steel tensile specimens were manufactured in three different orientations for the analysis of anisotropy. The first set of specimens was built vertically on the build platform, and two other sets were oriented horizontally perpendicular to each other. Tensile test results show that mean Young’s modulus of vertically built specimens is significantly less then horizontal ones (158.7 GPa versus 198 GPa), as well as yield strength and elongation. A role of residual stress in a deviation of tensile loading diagrams is investigated as a possible explanation. Simulation of the build process on the basis of ABAQUS FEA software was used to predict residual stress in 316L cylindrical specimens. Virtual tensile test results show that residual stress affects the initial stage of the loading curve with a tendency to reduce apparent Young’s modulus, measured according to standard mechanical test methods. MDPI 2021-11-25 /pmc/articles/PMC8658429/ /pubmed/34885332 http://dx.doi.org/10.3390/ma14237176 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
Fedorenko, Alexey
Fedulov, Boris
Kuzminova, Yulia
Evlashin, Stanislav
Staroverov, Oleg
Tretyakov, Mikhail
Lomakin, Evgeny
Akhatov, Iskander
Anisotropy of Mechanical Properties and Residual Stress in Additively Manufactured 316L Specimens
title Anisotropy of Mechanical Properties and Residual Stress in Additively Manufactured 316L Specimens
title_full Anisotropy of Mechanical Properties and Residual Stress in Additively Manufactured 316L Specimens
title_fullStr Anisotropy of Mechanical Properties and Residual Stress in Additively Manufactured 316L Specimens
title_full_unstemmed Anisotropy of Mechanical Properties and Residual Stress in Additively Manufactured 316L Specimens
title_short Anisotropy of Mechanical Properties and Residual Stress in Additively Manufactured 316L Specimens
title_sort anisotropy of mechanical properties and residual stress in additively manufactured 316l specimens
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658429/
https://www.ncbi.nlm.nih.gov/pubmed/34885332
http://dx.doi.org/10.3390/ma14237176
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