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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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document
Influence of atmosphere on microstructure and nitrogen content in AISI 316L fabricated by laser‐based powder bed fusion
Abstract
The present work focuses on the influence of the composition of the protective gas (argon or nitrogen) used in laser‐based powder bed fusion (L‐PBF) on the nitrogen content, microstructure and hardness of AISI 316L austenitic stainless steel. L‐PBF of AISI 316L powder using Ar gas resulted in loss of nitrogen in the final part. On the other hand, L‐PBF using N<sub>2</sub> gas resulted inan increase in nitrogen content in the final part, showing that nitrogen is absorbed during L‐PBF manufacturing in N<sub>2</sub> gas. The nitrogen absorption implies that the build part is actually AISI 316LN rather than AISI 316L.The microstructures of 316L specimens manufactured in both atmospheres exhibited highly elongated γ‐austenite grains, with acellular structure. The hardness of the part manufactured in N<sub>2</sub> gas was systematically higher than the part manufactured in Ar. For the part manufactured in Ar, a clear gradual decrease in hardness was observed with increasing distance from the build plate, whilefor the N<sub>2</sub> manufactured part this hardness decrease is first observed at some distance from the build plate.For the part manufactured in Ar, a larger variation in the measured nitrogen content was observed. Moreover, a systematically lower and position dependent micro‐hardness and inhomogeneous etching response of this specimen indicate an inhomogeneous microstructure in the build.The results demonstrate that the nitrogen content of L‐PBF manufactured AISI 316L depends on the composition of the gas atmosphere used in the chamber. It is discussed qualitatively how desorption and absorption of nitrogen from the applied atmosphere play a role on the resulting composition and microstructure of the build part.