| 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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Nadimpalli, Venkata Karthik
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (35/35 displayed)
- 2024Recrystallization kinetics in 3D printed 316L stainless steelcitations
- 2024Integration of spray-formed AISI H13 overspray powder in additive manufacturing to enable a circular ecosystem
- 2024Validation of an experimentally-based heat source for flash heating modelling of directed energy deposition: Systematic study of process and simulation parameterscitations
- 2024Applying systems engineering principles to develop an open source laser based metal powder bed fusion systemcitations
- 2024Microstructural evolution of multilayered AISI 316L-440C steel composites manufactured by laser powder bed fusioncitations
- 2024Towards manufacturing intra-layer multi-material mould tools with vertical interfaces using laser-based powder bed fusioncitations
- 2024Novel approach for optimizing mechanical and damping performance of MABS composites reinforced with basalt fiberscitations
- 2024Validation of an experimentally-based heat source for flash heating modeling of directed energy deposition: Systematic study of process and simulation parameterscitations
- 2023Preliminary geometric tests of an open-source metal laser powder bed fusion system
- 2023Effect of heat treatment processes on the microstructure and mechanical properties of spray-formed 440C martensitic stainless steelcitations
- 2023Effect of heat treatment processes on the microstructure and mechanical properties of spray-formed 440C martensitic stainless steelcitations
- 2023Wire arc additive manufacturing of thin and thick walls made of duplex stainless steelcitations
- 2023A systematic comparison between green and infrared laser for laser powder bed fusion of pure copper through a benchmark artefact
- 2023Impact of Saturation, Layer Thickness and Part Orientation on Green Strength in Metal Binder Jetting Additive Manufacturing of Powder Feedstock Obtained from Spray Forming
- 2023Impact of Saturation, Layer Thickness and Part Orientation on Green Strength in Metal Binder Jetting Additive Manufacturing of Powder Feedstock Obtained from Spray Forming
- 2023Experimental Analysis and Spatial Component Impact of the Inert Cross Flow in Open-Architecture Laser Powder Bed Fusioncitations
- 2022Additive Manufacturing of High-Resolution PZT Components: Slurry development, Characterization, Design, and Fabrication
- 2022Evaluating the scalability of channels made by Binder Jetting and Laser Powder Bed Fusion using an X-ray CT and image analysis approach
- 2022Powder manufacturing for powder metallurgy
- 2022Powder-based additive manufacturing of high-nitrogen stainless steels and austenitic nickel alloys
- 2022Powder-based additive manufacturing of high-nitrogen stainless steels and austenitic nickel alloys
- 2022Towards the additive manufacturing of Ni-Mn-Ga complex devices with magnetic field induced straincitations
- 2021Interface engineering of functionally graded steel-steel composites by laser powder bed fusioncitations
- 2021In-situ interstitial alloying during laser powder bed fusion of AISI 316 for superior corrosion resistancecitations
- 2021In-situ interstitial alloying during laser powder bed fusion of AISI 316 for superior corrosion resistancecitations
- 2021On the role of the powder stream on the heat and fluid flow conditions during Directed Energy Deposition of maraging steel - Multiphysics modelling and experimental validationcitations
- 2021Additive Manufacturing of Functional Metalscitations
- 2021A fundamental investigation of thermo-capillarity in laser powder bed fusion of metals and alloyscitations
- 2020Monitoring and repair of defects in ultrasonic additive manufacturingcitations
- 2020Resolving the effects of local convective heat transfer via adjustment of thermo-physical properties in pure heat conduction simulation of Laser Powder Bed Fusion (L-PBF)citations
- 2019Influence of atmosphere on microstructure and nitrogen content in AISI 316L fabricated by laser‐based powder bed fusion
- 2019Influence of atmosphere on microstructure and nitrogen content in AISI 316L fabricated by laser‐based powder bed fusion
- 2019Micro-CT Evaluation of Defects in Ti-6Al-4V Parts Fabricated by Metal Additive Manufacturingcitations
- 2019A method for identification and quantification of thermal lensing in powder bed fusion
- 2019Multi-material additive manufacturing of steels using laser powder bed fusion
Places of action
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article
A fundamental investigation of thermo-capillarity in laser powder bed fusion of metals and alloys
Abstract
Several different interfacial forces affect the free surface of liquid metals during metal additive manufacturing processes. One of these is thermo-capillarity or the so-called Marangoni effect. In this work, a novel framework is introduced for unraveling the effects of thermo-capillarity on the melt pool morphology/size and its thermo-fluid conditions during the Laser Powder Bed Fusion (L-PBF) process. In this respect, a multi-physics numerical model is developed based on the commercial software package Flow-3D. The model is verified and validated via mesh-independency analysis and by comparison of the predicted melt pool profile with those from lab-scale single-track experiments. Two sets of parametric studies are carried out to find the role of both positive and inverse thermo-capillarity on the melt pool shape and its thermal and fluid dynamics conditions. The thermo-fluid conditions of the melt pool are further investigated using appropriate dimensionless numbers. The results show that for the higher Marangoni number cases, the melt pool temperature drops, and at the same time, the temperature field becomes more uniform. Also, it is shown that at higher Marangoni numbers, temperature gradients decrease, thus reducing the role of conduction in the heat transfer from the melt pool. Furthermore, for the first time, a novel methodology is introduced for the calculation of the melt pool's average Nusselt number. The average Nusselt numbers calculated for the positive and inverse thermo-capillarity are then used for finding the effective liquid conductivity required for a computationally cheaper pure heat conduction simulation. The results show that the deviation between the average melt pool temperature, using the pure conduction model with effective conductivity, and the one obtained from the advanced fluid dynamics model is less than 2%.