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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Moosmann, Julian
Helmholtz-Zentrum Hereon
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2024Unveiling thermo‐fluid dynamic phenomena in laser beam welding
- 2024Exploring spatial beam shaping in laser powder bed fusion:High-fidelity simulation and in-situ monitoringcitations
- 2024Improvement of corrosion resistance of PEO coated dissimilar Ti/Mg0.6Ca couplecitations
- 2024Improvement of corrosion resistance of PEO coated dissimilar Ti/Mg0.6Ca couplecitations
- 2024Towards an Understanding of the Challenges in Laser Beam Welding of Copper - Observation of the Laser-Matter Interaction Zone in Laser Beam Welding of Copper and Steel Using in Situ Synchrotron X-Ray Imagingcitations
- 2024Pull‐Out Testing of Electrochemically Etched NiTi Shape Memory Alloy Wires in Shape Memory Alloy Hybrid Composites
- 2024Pull‐Out Testing of Electrochemically Etched NiTi Shape Memory Alloy Wires in Shape Memory Alloy Hybrid Composites
- 2024Challenges in non-destructive X-ray CT testing of riveted joints in the automotive industrycitations
- 2023Interface failure analysis of embedded NiTi SMA wires using in situ high-resolution X-ray synchrotron tomographycitations
- 2023Analysis on the influence of vapor capillary aspect ratio on pore formation in laser beam welding of aluminumcitations
- 2023Towards an Understanding of the Challenges in Laser Beam Welding of Copper – Observation of the Laser-Matter Interaction Zone in Laser Beam Welding of Copper and Steel Using in Situ Synchrotron X-Ray Imagingcitations
- 2022Assessing the long-term in vivo degradation behavior of magnesium alloys - a high resolution synchrotron radiation micro computed tomography studycitations
- 2022Pore Formation and Melt Pool Analysis of Laser Welded Al-Cu Joints using Synchrotron Radiationcitations
- 2022Pore formation and melt pool analysis of laser welded Al-Cu joints using synchrotron radiationcitations
- 2021Assessing the microstructure and in vitro degradation behavior of Mg-xGd screw implants using µCTcitations
- 2021Assessing the microstructure and in vitro degradation behavior of Mg-xGd screw implants using µCTcitations
- 2021Multimodal ex vivo methods reveal that Gd-rich corrosion byproducts remain at the implant site of biodegradable Mg-Gd screwscitations
- 2019A load frame for in situ tomography at PETRA IIIcitations
- 2019A load frame for in situ tomography at PETRA IIIcitations
- 2018Visualization of Implant Failure by Synchrotron Tomographycitations
Places of action
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article
Pore Formation and Melt Pool Analysis of Laser Welded Al-Cu Joints using Synchrotron Radiation
Abstract
nown as challenging material combination, the welding of aluminium and copper, both with strongly different thermophysical properties, causes joining failures such as pores, cracks or intermetallic phases in the solidified welding area. To investigate the mixing of the materials and the occurrence of pores, the laser welding process is observed with synchrotron radiation which visualizes the phase boundaries between solid, liquid and gaseous material phases. This allows the visualization of pore formation and density differences of the materials inside the melt pool. In this investigation, pore formation in front and bottom of the keyhole is observed. The movement of the bubbles in the melt pool can be tracked until solidification at the material transition. Regarding the intermixing of the materials, the high-speed images show a fluctuating copper flow towards the keyhole and a material mixing over the entire aluminium melt pool depth. By understanding the mechanisms, compensatory measures for an improved process can be developed to enable the usability of aluminium and copper connections, for example in electromobility applications.Keywords laser welding synchrotron aluminium copper melt pool dynamics pore formation