Synchrotron X-ray Analysis of the Influence of the Magnesium Content on the Absorptance during Full-Penetration Laser Welding of Aluminum
Full-penetration laser beam welding is characterized by a weld seam whose depth equals the material thickness. It is associated with a stable capillary and is therefore widely used for welding of sheet metal components. The realization of lightweight concepts in car body production requires the appl...
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MDPI AG
2021-05-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/5/797 |
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| author | Jonas Wagner Christian Hagenlocher Marc Hummel Alexander Olowinsky Rudolf Weber Thomas Graf |
| author_facet | Jonas Wagner Christian Hagenlocher Marc Hummel Alexander Olowinsky Rudolf Weber Thomas Graf |
| author_sort | Jonas Wagner |
| collection | DOAJ |
| description | Full-penetration laser beam welding is characterized by a weld seam whose depth equals the material thickness. It is associated with a stable capillary and is therefore widely used for welding of sheet metal components. The realization of lightweight concepts in car body production requires the application of high-strength aluminum alloys that contain magnesium as an alloying element, which significantly influences the evaporation temperature and pressure. This change of the evaporation processes influences the geometry of the capillary and therefore its absorptance. In order to quantify the influence of magnesium on the capillary, their geometries were captured by means of high-speed synchrotron X-ray imaging during the welding process of the aluminum alloys AA1050A (Al99.5), AA5754 (AlMg3) and AA6016 (AlSi1.2Mg0.4). The 3D-geometries of the capillaries were reconstructed from the intensity distribution in the recorded X-ray images and their absorptance of the incident laser beam was determined by the analysis of the reconstructed 3D-geometry with a raytracing algorithm. The results presented in this paper capture for the first time the influence of the magnesium content in high-strength aluminum alloys on the aspect ratio of the capillary, which explains the reduced absorptance in case of full-penetration laser beam welding of aluminum alloys with a high content of volatile elements. In order to improve the absorptance in full-penetration welding, these findings provide the information required for the deduction of new optimization approaches. |
| first_indexed | 2024-03-10T11:23:40Z |
| format | Article |
| id | doaj.art-273f30afb7fd4f3f8fa89b2b2e6abf16 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T11:23:40Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-273f30afb7fd4f3f8fa89b2b2e6abf162023-11-21T19:48:03ZengMDPI AGMetals2075-47012021-05-0111579710.3390/met11050797Synchrotron X-ray Analysis of the Influence of the Magnesium Content on the Absorptance during Full-Penetration Laser Welding of AluminumJonas Wagner0Christian Hagenlocher1Marc Hummel2Alexander Olowinsky3Rudolf Weber4Thomas Graf5Institut für Strahlwerkzeuge IFSW, University of Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart, GermanyInstitut für Strahlwerkzeuge IFSW, University of Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart, GermanyChair for Laser Technology LLT, RWTH Aachen University, Steinbachstr. 15, 52074 Aachen, GermanyFraunhofer Institute for Laser Technology ILT, Steinbachstr. 15, 52074 Aachen, GermanyInstitut für Strahlwerkzeuge IFSW, University of Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart, GermanyInstitut für Strahlwerkzeuge IFSW, University of Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart, GermanyFull-penetration laser beam welding is characterized by a weld seam whose depth equals the material thickness. It is associated with a stable capillary and is therefore widely used for welding of sheet metal components. The realization of lightweight concepts in car body production requires the application of high-strength aluminum alloys that contain magnesium as an alloying element, which significantly influences the evaporation temperature and pressure. This change of the evaporation processes influences the geometry of the capillary and therefore its absorptance. In order to quantify the influence of magnesium on the capillary, their geometries were captured by means of high-speed synchrotron X-ray imaging during the welding process of the aluminum alloys AA1050A (Al99.5), AA5754 (AlMg3) and AA6016 (AlSi1.2Mg0.4). The 3D-geometries of the capillaries were reconstructed from the intensity distribution in the recorded X-ray images and their absorptance of the incident laser beam was determined by the analysis of the reconstructed 3D-geometry with a raytracing algorithm. The results presented in this paper capture for the first time the influence of the magnesium content in high-strength aluminum alloys on the aspect ratio of the capillary, which explains the reduced absorptance in case of full-penetration laser beam welding of aluminum alloys with a high content of volatile elements. In order to improve the absorptance in full-penetration welding, these findings provide the information required for the deduction of new optimization approaches.https://www.mdpi.com/2075-4701/11/5/797laser beam weldingaluminum alloysfull-penetrationX-ray imagingsynchrotronabsorptance |
| spellingShingle | Jonas Wagner Christian Hagenlocher Marc Hummel Alexander Olowinsky Rudolf Weber Thomas Graf Synchrotron X-ray Analysis of the Influence of the Magnesium Content on the Absorptance during Full-Penetration Laser Welding of Aluminum Metals laser beam welding aluminum alloys full-penetration X-ray imaging synchrotron absorptance |
| title | Synchrotron X-ray Analysis of the Influence of the Magnesium Content on the Absorptance during Full-Penetration Laser Welding of Aluminum |
| title_full | Synchrotron X-ray Analysis of the Influence of the Magnesium Content on the Absorptance during Full-Penetration Laser Welding of Aluminum |
| title_fullStr | Synchrotron X-ray Analysis of the Influence of the Magnesium Content on the Absorptance during Full-Penetration Laser Welding of Aluminum |
| title_full_unstemmed | Synchrotron X-ray Analysis of the Influence of the Magnesium Content on the Absorptance during Full-Penetration Laser Welding of Aluminum |
| title_short | Synchrotron X-ray Analysis of the Influence of the Magnesium Content on the Absorptance during Full-Penetration Laser Welding of Aluminum |
| title_sort | synchrotron x ray analysis of the influence of the magnesium content on the absorptance during full penetration laser welding of aluminum |
| topic | laser beam welding aluminum alloys full-penetration X-ray imaging synchrotron absorptance |
| url | https://www.mdpi.com/2075-4701/11/5/797 |
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