Electron-Beam Welding Cu and Al6082T6 Aluminum Alloys with Circular Beam Oscillations
In this study, we present the results from electron-beam welding operations applied on copper and Al6082T6 aluminum alloys. The influence of beam-scanning geometries on the structure and mechanical properties of the welded joint is studied. The experiments were conducted using a circle oscillation m...
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MDPI AG
2022-12-01
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| Online Access: | https://www.mdpi.com/2073-4352/12/12/1757 |
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| author | Darina Kaisheva Angel Anchev Vladimir Dunchev Georgi Kotlarski Borislav Stoyanov Maria Ormanova Stefan Valkov |
| author_facet | Darina Kaisheva Angel Anchev Vladimir Dunchev Georgi Kotlarski Borislav Stoyanov Maria Ormanova Stefan Valkov |
| author_sort | Darina Kaisheva |
| collection | DOAJ |
| description | In this study, we present the results from electron-beam welding operations applied on copper and Al6082T6 aluminum alloys. The influence of beam-scanning geometries on the structure and mechanical properties of the welded joint is studied. The experiments were conducted using a circle oscillation mode with an oscillation radius of 0.1 mm and 0.2 mm. The beam deflection was set to 0.4 mm with respect to the side of the aluminum alloy, and the beam power was set at 2700 W. The phase composition of the obtained welded joints was studied by X-ray diffraction (XRD). Scanning electron microscopy (SEM) was used for the investigation of the microstructure of the joints. The chemical composition was investigated by using energy-dispersive X-ray spectroscopy (EDX). The mechanical properties were studied by micro-hardness investigations. The fusion zone of the weld seam contains three phases—an aluminum matrix, an ordered solid solution of copper and aluminum in the form of CuAl<sub>2</sub>, and pure copper. Electron beam-scanning geometries have significant influences on the structure of the weld. Increasing the beam oscillation’s radius leads to a decrease in intermetallic phases and improves homogeneity. The measured microhardness values in the fusion zone are much higher than the ones measured in the base metals due to the formation of intermetallic phases. The microhardness of the weld joint formed using an oscillation radius of 0.2 mm was much lower compared to the one formed using an oscillation radius of 0.1 mm. |
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| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T17:09:10Z |
| publishDate | 2022-12-01 |
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| series | Crystals |
| spelling | doaj.art-46c67af314ab4adc927b847d2acbf6c62023-11-24T14:10:25ZengMDPI AGCrystals2073-43522022-12-011212175710.3390/cryst12121757Electron-Beam Welding Cu and Al6082T6 Aluminum Alloys with Circular Beam OscillationsDarina Kaisheva0Angel Anchev1Vladimir Dunchev2Georgi Kotlarski3Borislav Stoyanov4Maria Ormanova5Stefan Valkov6Academician Emil Djakov Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chausse Blvd, 1784 Sofia, BulgariaDepartment of Material Science and Mechanics of Materials, Technical University of Gabrovo, 4 Hadji Dimitar Street, 5300 Gabrovo, BulgariaDepartment of Material Science and Mechanics of Materials, Technical University of Gabrovo, 4 Hadji Dimitar Street, 5300 Gabrovo, BulgariaAcademician Emil Djakov Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chausse Blvd, 1784 Sofia, BulgariaDepartment of Industrial Design and Textile Engineering, Technical University of Gabrovo, 4 Hadji Dimitar Street, 5300 Gabrovo, BulgariaAcademician Emil Djakov Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chausse Blvd, 1784 Sofia, BulgariaAcademician Emil Djakov Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chausse Blvd, 1784 Sofia, BulgariaIn this study, we present the results from electron-beam welding operations applied on copper and Al6082T6 aluminum alloys. The influence of beam-scanning geometries on the structure and mechanical properties of the welded joint is studied. The experiments were conducted using a circle oscillation mode with an oscillation radius of 0.1 mm and 0.2 mm. The beam deflection was set to 0.4 mm with respect to the side of the aluminum alloy, and the beam power was set at 2700 W. The phase composition of the obtained welded joints was studied by X-ray diffraction (XRD). Scanning electron microscopy (SEM) was used for the investigation of the microstructure of the joints. The chemical composition was investigated by using energy-dispersive X-ray spectroscopy (EDX). The mechanical properties were studied by micro-hardness investigations. The fusion zone of the weld seam contains three phases—an aluminum matrix, an ordered solid solution of copper and aluminum in the form of CuAl<sub>2</sub>, and pure copper. Electron beam-scanning geometries have significant influences on the structure of the weld. Increasing the beam oscillation’s radius leads to a decrease in intermetallic phases and improves homogeneity. The measured microhardness values in the fusion zone are much higher than the ones measured in the base metals due to the formation of intermetallic phases. The microhardness of the weld joint formed using an oscillation radius of 0.2 mm was much lower compared to the one formed using an oscillation radius of 0.1 mm.https://www.mdpi.com/2073-4352/12/12/1757electron-beam weldingbeam oscillationdissimilar materialsaluminumcopper |
| spellingShingle | Darina Kaisheva Angel Anchev Vladimir Dunchev Georgi Kotlarski Borislav Stoyanov Maria Ormanova Stefan Valkov Electron-Beam Welding Cu and Al6082T6 Aluminum Alloys with Circular Beam Oscillations Crystals electron-beam welding beam oscillation dissimilar materials aluminum copper |
| title | Electron-Beam Welding Cu and Al6082T6 Aluminum Alloys with Circular Beam Oscillations |
| title_full | Electron-Beam Welding Cu and Al6082T6 Aluminum Alloys with Circular Beam Oscillations |
| title_fullStr | Electron-Beam Welding Cu and Al6082T6 Aluminum Alloys with Circular Beam Oscillations |
| title_full_unstemmed | Electron-Beam Welding Cu and Al6082T6 Aluminum Alloys with Circular Beam Oscillations |
| title_short | Electron-Beam Welding Cu and Al6082T6 Aluminum Alloys with Circular Beam Oscillations |
| title_sort | electron beam welding cu and al6082t6 aluminum alloys with circular beam oscillations |
| topic | electron-beam welding beam oscillation dissimilar materials aluminum copper |
| url | https://www.mdpi.com/2073-4352/12/12/1757 |
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