| 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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Carin, Muriel
Processes and Engineering in Mechanics and Materials
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2023A novel apparatus dedicated to the estimation of the thermal diffusivity of metals at high temperaturecitations
- 2023A novel hydraulic bulge test in hot forming conditionscitations
- 2022Conventional Meso-Scale and Time-Efficient Sub-Track-Scale Thermomechanical Model for Directed Energy Depositioncitations
- 2022Numerical modeling for large-scale parts fabricated by Directed Energy Depositioncitations
- 2018Design and development of an induction furnace to characterize molten metals at high temperatures
- 2018Investigation of the progressive hot die stamping of a complex boron steel part using numerical simulations and Gleeble testscitations
- 2014A model comparison to predict heat transfer during spot GTA weldingcitations
- 2014Influence of a pulsed laser regime on surface finish induced by thedirect metal deposition process on a Ti64 alloycitations
- 2013A model comparison to predict heat transfer during spot GTA weldingcitations
- 2013A model comparison to predict heat transfer during spot GTA weldingcitations
- 2012Influence of various process conditions on surface finishes induced by the direct metal deposition laser technique on a Ti-6Al-4V alloycitations
- 2012Surface Finish Issues after Direct Metal Deposition
- 2012Influence of various process conditions on surface finishes induced by the direct metal deposition laser technique on a Ti–6Al–4V alloycitations
- 20122D longitudinal modeling of heat transfer and fluid flow during multilayered
- 20122D longitudinal modeling of heat transfer and fluid flow during multilayered
- 20113D heat transfer model of hybrid laser Nd : Yag-MAG welding of a S355 steel and experimental validationcitations
- 20113D heat transfer model of hybrid laser Nd : Yag-MAG welding of a S355 steel and experimental validationcitations
- 2011Analysis of hybrid Nd:Yag laser-MAG arc welding processes.citations
- 2011Analysis of hybrid Nd:Yag laser-MAG arc welding processes.citations
- 2011Estimation of a source term in a quasi steady two-dimensional heat transfer problem: application to an electron beam weldingcitations
- 2006Thermo-mechanical modelling for the opening of electron-beam welded jointscitations
Places of action
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article
2D longitudinal modeling of heat transfer and fluid flow during multilayered
Abstract
Derived from laser cladding, the Direct Laser Metal Deposition (DLMD) process is based upon a laser beam - powder - melt pool interaction, and enables the manufacturing of complex 3D shapes much faster than conventional processes. However, the surface finish remains critical, and DLMD parts usually necessitate post-machining steps. Within this context, the focus of our work is to improve the understanding of the phenomena responsible for deleterious surface finish by using numerical simulation. Mass, momentum, and energy conservation equations are solved using COMSOL Multiphysics® in a 2D transient model including filler material with surface tension and thermocapillary effects at the free surface. The dynamic shape of the molten zone is explicitly described by a moving mesh based on an Arbitrary Lagrangian Eulerian method (ALE). This model is used to analyze the influence of the process parameters, such as laser power, scanning speed, and powder feed rate, on the melt pool behavior. The simulations of a single layer and multilayer claddings are presented. The numerical results are compared with experimental data, in terms of layer height, melt pool length, and depth of penetration, obtained from high speed camera. The experiments are carried out on a widely-used aeronautical alloy (Ti-6Al-4V) using a Nd:YAG laser. The results show that the dilution ratio increases with increasing the laser power and the scanning velocity, or with decreasing the powder feed rate. The final surface finish is then improved.