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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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Leung, Chu Lun Alex
University College London
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024An in situ imaging investigation of the effect of gas flow rates on directed energy depositioncitations
- 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
- 2024Correlative spatter and vapour depression dynamics during laser powder bed fusion of an Al-Fe-Zr alloycitations
- 2024Characterisation of materials properties and defects in structure fabricated via additive friction stir deposition
- 2023In situ correlative observation of humping-induced cracking in directed energy deposition of nickel-based superalloys
- 2022Quantification of Interdependent Dynamics during Laser Additive Manufacturing Using X-Ray Imaging Informed Multi-Physics and Multiphase Simulation
- 2021Oxidation induced mechanisms during directed energy deposition additive manufactured titanium alloy buildscitations
- 2021Achieving homogeneity in a high-Fe beta-Ti alloy laser-printed from blended elemental powderscitations
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document
Characterisation of materials properties and defects in structure fabricated via additive friction stir deposition
Abstract
<title>Abstract</title><p>Additive friction stir deposition (AFSD) is an emerging solid-state non-fusion additive manufacturing (AM) technology, which produces parts with wrought-like material properties, high deposition rates, and low residual stresses. However, impact of process interruption on defect formation and mechanical properties has not yet been well-addressed in literature. In this study, Al6061 aluminium structure with two final heights and deposition interruption is successfully manufactured via AFSD and characterised. Defect analysis conducted via optical microscopy, electron microscopy, and X-ray computed tomography reveals >99% relative density with minimal defects in centre of the parts. However, tunnel defects at interface between substrate and deposit as well as kissing bonds are present. Edge of deposit contains tunnel defects due to preference for greater material deposition on advancing side of rotating tool. Virtual machining highlights the ability to remove defects via post processing, avoiding mechanical performance impact of stress concentrating pores. Electron back scatter diffraction revealed regions with localised shear bands contain 1-5 µm equivalent circular diameter grains. Kissing bonds exhibit in areas separated by large grain size difference. Meanwhile, Vickers hardness testing reveals hardness variation with deposit height.This work advances the understanding of complex microstructure development, material flow, and mechanical behaviour of AFSD Al6061 alloy.</p>