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Influence of Beam Figure on Porosity of Electron Beam Welded Thin-Walled Aluminum Plates

Welded aluminum components in the aerospace industry are subject to more stringent safety regulations than in other industries. Electron beam welding as a highly precise process fulfills this requirement. The welding of aluminum poses a challenge due to its high tendency to pore formation. To gain a...

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Detalles Bibliográficos
Autores principales: Moschinger, Matthias, Mittermayr, Florian, Enzinger, Norbert
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9146801/
https://www.ncbi.nlm.nih.gov/pubmed/35629546
http://dx.doi.org/10.3390/ma15103519
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author Moschinger, Matthias
Mittermayr, Florian
Enzinger, Norbert
author_facet Moschinger, Matthias
Mittermayr, Florian
Enzinger, Norbert
author_sort Moschinger, Matthias
collection PubMed
description Welded aluminum components in the aerospace industry are subject to more stringent safety regulations than in other industries. Electron beam welding as a highly precise process fulfills this requirement. The welding of aluminum poses a challenge due to its high tendency to pore formation. To gain a better understanding of pore formation during the process, 1.5 mm thick aluminum AW6082 plates were welded using specially devised beam figures in different configurations. The obtained welds were examined with radiographic testing to evaluate the size, distribution, and the number of pores. Cross-sections of the welds were investigated with light microscopy and an electron probe microanalyzer to decipher the potential mechanisms that led to porosity. The examined welds showed that the porosity is influenced in various ways by the used figures, but it cannot be completely avoided. Chemical and microstructural analyzes have revealed that the main mechanism for pore formation was the evaporation of the alloying elements Mg and Zn. This study demonstrates that the number of pores can be reduced and their size can be minimized using a proper beam figure and energy distribution.
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spelling pubmed-91468012022-05-29 Influence of Beam Figure on Porosity of Electron Beam Welded Thin-Walled Aluminum Plates Moschinger, Matthias Mittermayr, Florian Enzinger, Norbert Materials (Basel) Article Welded aluminum components in the aerospace industry are subject to more stringent safety regulations than in other industries. Electron beam welding as a highly precise process fulfills this requirement. The welding of aluminum poses a challenge due to its high tendency to pore formation. To gain a better understanding of pore formation during the process, 1.5 mm thick aluminum AW6082 plates were welded using specially devised beam figures in different configurations. The obtained welds were examined with radiographic testing to evaluate the size, distribution, and the number of pores. Cross-sections of the welds were investigated with light microscopy and an electron probe microanalyzer to decipher the potential mechanisms that led to porosity. The examined welds showed that the porosity is influenced in various ways by the used figures, but it cannot be completely avoided. Chemical and microstructural analyzes have revealed that the main mechanism for pore formation was the evaporation of the alloying elements Mg and Zn. This study demonstrates that the number of pores can be reduced and their size can be minimized using a proper beam figure and energy distribution. MDPI 2022-05-13 /pmc/articles/PMC9146801/ /pubmed/35629546 http://dx.doi.org/10.3390/ma15103519 Text en © 2022 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
Moschinger, Matthias
Mittermayr, Florian
Enzinger, Norbert
Influence of Beam Figure on Porosity of Electron Beam Welded Thin-Walled Aluminum Plates
title Influence of Beam Figure on Porosity of Electron Beam Welded Thin-Walled Aluminum Plates
title_full Influence of Beam Figure on Porosity of Electron Beam Welded Thin-Walled Aluminum Plates
title_fullStr Influence of Beam Figure on Porosity of Electron Beam Welded Thin-Walled Aluminum Plates
title_full_unstemmed Influence of Beam Figure on Porosity of Electron Beam Welded Thin-Walled Aluminum Plates
title_short Influence of Beam Figure on Porosity of Electron Beam Welded Thin-Walled Aluminum Plates
title_sort influence of beam figure on porosity of electron beam welded thin-walled aluminum plates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9146801/
https://www.ncbi.nlm.nih.gov/pubmed/35629546
http://dx.doi.org/10.3390/ma15103519
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