| 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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Valente, Emilie Hørdum
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2023Wire arc additive manufacturing of thin and thick walls made of duplex stainless steelcitations
- 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
- 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
- 2021Microstructure Optimization of AM metals through heat treatment and interstitial alloying
- 2021Targeted heat treatment of additively manufactured Ti-6Al-4V for controlled formation of Bi-lamellar microstructurescitations
- 2020Gaseous surface hardening of Ti-6Al-4V fabricated by selective laser meltingcitations
- 2019Effect of scanning strategy during selective laser melting on surface topography, porosity, and microstructure of additively manufactured Ti-6Al-4Vcitations
- 2019Effect of scanning strategy during selective laser melting on surface topography, porosity, and microstructure of additively manufactured Ti-6Al-4Vcitations
- 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
- 2019The Effect of Heat Treatment and Surface Hardening of 3D Printed Austenitic Stainless Steel AISI316l on Corrosion and Wear Properties
- 2019The Effect of Heat Treatment and Surface Hardening of 3D Printed Austenitic Stainless Steel AISI316l on Corrosion and Wear Properties
- 2019A method for identification and quantification of thermal lensing in powder bed fusion
- 2019Multi-material additive manufacturing of steels using laser powder bed fusion
- 2018High-temperature solution nitriding and low-temperature surface nitriding of 3D printed stainless steel
- 2018Modelling of the microstructural evolution of Ti6Al4V parts produced by selective laser melting during heat treatment
Places of action
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conferencepaper
A method for identification and quantification of thermal lensing in powder bed fusion
Abstract
With the increase in use of L-PBF for functional components, an increase in productivity demands higher laser power and continuous operation. However, both these factors can affect the optics involved. The principal components of a Laser Powder Bed Fusion system are the galvanometer mirrors and the focusing lens.<br/>In the present work a method for identification and quantification of thermal lensing is proposed. Laser powder bed fusion experiments of stainless steel 316L powder was carried out at varying scan speeds and scan strategies in order to study the effects, of long exposure times, on the quality of single layer scans.<br/>It was observed that the heating of silver-coated mirrors under continuous exposure led to a significant decrease in the beam quality as evidenced by weld track widening and loss in depth of melt pool penetration. Power measurements conducted at various locations along the beam path indicated that the mirrors were absorbing up to 42 % of the total power coming from the laser while also defocusing the beam.<br/>Thus demonstrating the importance of including identification and quantification of thermal influence and possible instability of the optical elements as cause for irregular weld tracks.