| People | Locations | Statistics |
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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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Rack, Alexander
European Synchrotron Radiation Facility
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2024Pore evolution mechanisms during directed energy deposition additive manufacturingcitations
- 2024Pore evolution mechanisms during directed energy deposition additive manufacturing
- 2024AM-SegNet for additive manufacturing in situ X-ray image segmentation and feature quantification
- 2024Characterising the compressive failure in 3D printed unidirectional Thermoplastic composites by Synchrotron CT
- 2024Correlative spatter and vapour depression dynamics during laser powder bed fusion of an Al-Fe-Zr alloycitations
- 20234D nanoimaging of early age cement hydrationcitations
- 2023Understanding the formation of “false friends” (hidden lack of fusion defects) in laser beam welding by means of high-speed synchrotron X-ray imagingcitations
- 2023Osteogenic Effect of a Bioactive Calcium Alkali Phosphate Bone Substitute in Humanscitations
- 2023Effect of partial and global shielding on surface-driven phenomena in keyhole mode laser beam weldingcitations
- 2023Effect of partial and global shielding on surface-driven phenomena in keyhole mode laser beam weldingcitations
- 2021Ultra-high speed X-ray imaging of dynamic fracturing in cementitious materials under impact ; Imagerie aux rayons X ultra-rapide de la fracturation dynamique dans des matériaux cimentaires sous impactcitations
- 2019Coalescence Avalanches in Liquid Aluminum Foams
- 2019Dynamic compression of 3D printed metallic microstructures with in-situ X-ray imaging
- 2017Combining Coherent Hard X-Ray Tomographies with Phase Retrieval to Generate Three-Dimensional Models of Forming Bonecitations
- 2016Synchrotron Microtomography Investigation of the Filament Microstructure in Differently Processed Bi-2212 Wirescitations
- 2015Micro- and nano-structural details of a spider's filter for substrate vibrationscitations
- 2014Self-similar mesostructure evolution of the growing mollusc shell reminiscent of thermodynamically driven grain growthcitations
- 2013Characterization of crocodile teeth: Correlation of composition, microstructure, and hardnesscitations
Places of action
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article
Correlative spatter and vapour depression dynamics during laser powder bed fusion of an Al-Fe-Zr alloy
Abstract
<jats:title>Abstract</jats:title><jats:p>Spatter during laser powder bed fusion (LPBF) can induce surface defects, impacting the fatigue performance of the fabricated components. Here, we reveal and explain the links between vapour depression shape and spatter dynamics during LPBF of an Al-Fe-Zr aluminium alloy using high-speed synchrotron x-ray imaging. We quantify the number, trajectory angle, velocity, and kinetic energy of the spatter as a function of vapour depression zone/keyhole morphology under industry-relevant processing conditions. The depression zone/keyhole morphology was found to influence the spatter ejection angle in keyhole versus conduction melting modes: (i) the vapour-pressure driven plume in conduction mode with a quasi-semi-circular depression zone leads to backward spatter whereas; and (ii) the keyhole rear wall redirects the gas/vapour flow to cause vertical spatter ejection and rear rim droplet spatter. Increasing the opening of the keyhole or vapour depression zone can reduce entrainment of solid spatter. We discover a spatter-induced cavity mechanism in which small spatter particles are accelerated towards the powder bed after laser-spatter interaction, inducing powder denudation and cavities on the printed surface. By quantifying these laser-spatter interactions, we suggest a printing strategy for minimising defects and improving the surface quality of LPBF parts.</jats:p>