| 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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Mohanty, Sankhya
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (31/31 displayed)
- 2024Quantifying Intra-Tow Fiber Volume Fraction in GFRP::A Comparison of 3D Non-Destructive X-ray Computed Tomography and Destructive Optical Microscopy
- 2023Holistic computational design within additive manufacturing through topology optimization combined with multiphysics multi-scale materials and process modellingcitations
- 2022Increasing the productivity of selective laser sintering workflow by integrating cooling channels in the printing powder matrixcitations
- 2021Towards a digital twin of laser powder bed fusion with a focus on gas flow variablescitations
- 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
- 2020Numerical investigation into the effect of different parameters on the geometrical precision in the laser-based powder bed fusion process Chaincitations
- 2020Numerical investigation into the effect of different parameters on the geometrical precision in the laser-based powder bed fusion process Chaincitations
- 2020Multi-metal additive manufacturing process chain for optical quality mold generationcitations
- 2020Laser polishing of additively manufactured Ti-6Al-4V: Microstructure evolution and material propertiescitations
- 2020Realistic design of laser powder bed fusion channelscitations
- 2020Microstructural modelling of above β-transus heat treatment of additively manufactured Ti-6Al-4V using cellular automatacitations
- 2020X-ray CT and image analysis methodology for local roughness characterization in cooling channels made by metal additive manufacturingcitations
- 2019Roughness Investigation of SLM Manufactured Conformal Cooling Channels Using X-ray Computed Tomography
- 2019Roughness Investigation of SLM Manufactured Conformal Cooling Channels Using X-ray Computed Tomography
- 2019Multi-material additive manufacturing of steels using laser powder bed fusion
- 2019A systematic investigation of the effects of process parameters on heat and fluid flow and metallurgical conditions during laser-based powder bed fusion of Ti6Al4V alloycitations
- 2019Build orientation effects on the roughness of SLM channels
- 2018Multiphysics modelling of manufacturing processes: A reviewcitations
- 2018Multiphysics modelling of manufacturing processes: A reviewcitations
- 2018Thermo-fluid-metallurgical modelling of laser-based powder bed fusion process
- 2018Modelling of the microstructural evolution of Ti6Al4V parts produced by selective laser melting during heat treatment
- 2018Thermo-fluid-metallurgical modelling of the selective laser melting process chaincitations
- 2018Numerical modelling and parametric study of grain morphology and resultant mechanical properties from selective laser melting process of Ti6Al4V
- 2018Defects investigation in additively manufactured steel products for injection moulding
- 2017Multi-objective optimization of cellular scanning strategy in selective laser meltingcitations
- 2017Laser additive manufacturing of multimaterial tool inserts: a simulation-based optimization studycitations
- 2016Improving accuracy of overhanging structures for selective laser melting through reliability characterization of single track formation on thick powder bedscitations
- 2016Reducing residual stresses and deformations in selective laser melting through multi-level multi-scale optimization of cellular scanning strategycitations
- 2015Cellular scanning strategy for selective laser melting: Generating reliable, optimized scanning paths and processing parameterscitations
- 2014Numerical Model based Reliability Estimation of Selective Laser Melting Processcitations
- 2013A finite volume alternate direction implicit approach to modeling selective laser melting
Places of action
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article
A systematic investigation of the effects of process parameters on heat and fluid flow and metallurgical conditions during laser-based powder bed fusion of Ti6Al4V alloy
Abstract
Additive manufacturing (AM) of metals faces a growing number of applications in different industries e.g. aerospace, medical, automotive, etc. Although metal AM outweighs current conventional production methods in some certain areas, the exact effect of processing conditions on the final quality and microstructure of the parts is still not well understood. An efficient way of understanding the effect of these processing conditions on a part’s quality is via a calibrated and validated numerical model. Hence, in the current work a finite element model for analyzing the heat and fluid flow along with metallurgical conditions during Laser-based Powder Bed Fusion (L-PBF) of a titanium alloy has been developed and implemented in the commercial software code COMSOL Multiphysics. The thermal effect of the laser is modelled via a novel conico-Gaussian moving heat source, based on the concept of modified optical penetration depth. Analytical expressions for the geometrical distribution of the heat source are derived to obtain the heat source’s effective depth. The model has been both verified and validated through mesh sensitivity analysis and comparison with experimental results. Furthermore, a detailed description about the role of the various driving forces for fluid flow has been given based on a thorough analysis using relevant dimensionless numbers. A systematic procedure to study the influence of neglecting the fluid flow inside the melt pool on the thermal field has also been devised. Moreover, a parametric study has been carried out to understand the effect of varying beam size and laser travel speed on heat and fluid flow conditions along with the final microstructures. The results show that changing the beam size or travel speed highly influences the grain sizes, dendritic growth directions and also the grain morphologies. To study the metallurgical conditions of the process, a microstructural sub-model has been developed. It is shown that by choosing different process parameters, one can manipulate the direction of the dendritic growth and change the grain sizes. Specifically, it is found that the overall effect of changing beam size on grain morphology is less pronounced than changing the travelling speed.