| 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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Majkut, Marta
European Synchrotron Radiation Facility
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 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
- 2024Microstructure evolutions induced by electron beam melting of a sintered Cu-25Cr composite
- 2024Correlative spatter and vapour depression dynamics during laser powder bed fusion of an Al-Fe-Zr alloycitations
- 2023Environment effect on internal fatigue crack propagation studied with in-situ X-ray microtomographycitations
- 2022Evaluation of digital volume correlation (DVC) applicability in silicon dioxide (SiO2) particle-doped carbon fibre reinforced polymers using in situ synchrotron radiation computed tomography (SRCT)
- 2020In situ analysis of cast irons mechanical behaviour using synchrotron x-ray tomography and 3DXRDcitations
- 2020On the nucleation of deformation twins at the early stages of plasticitycitations
- 2018Dynamics and grain orientation dependence of the electric field induced phase transformation in Sm modified BiFeO 3 ceramicscitations
- 2017Electromechanical Response of Polycrystalline Barium Titanate Resolved at the Grain Scalecitations
- 2016Mapping of strain mechanisms in barium titanate by three-dimensional X-ray diffraction
- 2015Study of 3-D stress development in parent and twin pairs of a hexagonal close-packed polycrystal: Part I - In-situ three-dimensional synchrotron X-ray diffraction measurementcitations
- 2015On the deformation twinning of Mg AZ31Bcitations
- 2015Study of 3-D stress development in parent and twin pairs of a hexagonal close-packed polycrystal: Part II - Crystal plasticity finite element modelingcitations
- 2015On the deformation twinning of Mg AZ31B:A three-dimensional synchrotron X-ray diffraction experiment and crystal plasticity finite element modelcitations
- 2015On the deformation twinning of Mg AZ31B: A three-dimensional synchrotron X-ray diffraction experiment and crystal plasticity finite element modelcitations
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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>