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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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Bidare, Prveen
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Publications (10/10 displayed)
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- 2024A numerical model for predicting powder characteristics in LMD considering particle interactioncitations
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- 2022Microstructure evolution of three‑roll skew‑rolling formed hollow axles with uniform wall thicknesscitations
- 2022High-density direct laser deposition (DLD) of CM247LC alloycitations
- 2022Surface integrity of hybrid CM247LC/Inconel 718 components produced by laser-directed energy depositioncitations
- 2022Surface integrity of hybrid CM247LC /Inconel 718 components produced by laser directed energy depositioncitations
- 2017An open-architecture metal powder bed fusion system for in-situ process measurementscitations
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article
A numerical model for predicting powder characteristics in LMD considering particle interaction
Abstract
In this work, a numerical model is proposed to analyze the influence of particle–particle interaction in laser directed energy deposition or LMD (laser metal deposition) of CM247 Ni-based superalloy. The model is based on the analysis of contact between particles and the potential agglomeration of powder to predict powder conditions at the nozzle exit. Simulation results were experimentally validated and a good agreement was observed. At the nozzle exit mainly large particles (>100 lm) are found and small ones (<10 lm) tend to flow away from this region. This was also observed in the experimental PSD. Additionally, based on the relative velocity of particles, simulations are able to predict the formation of dents. In comparing virgin powder PSD and the one at the nozzle exit, it was observed that largest particles are collected at the exit. In order to explain this phenomena, particle agglomeration was analysed numerically. It was seen that small particles tend to adhere to the big ones due to their higher adhesive forces, which would explain the change in PSD.