| 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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Römer, Gert-Willem
University of Twente
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Design and implementation of dynamic beam shaping in high power laser processing by means of a Deformable Mirrorcitations
- 2023Laser intensity profile as a means to steer microstructure of deposited tracks in Directed Energy Depositioncitations
- 2022Wavelength dependence of picosecond-pulsed laser ablation of hot-dip galvanized steelcitations
- 2022Thermo-fluidic behavior to solidification microstructure texture evolution during laser-assisted powder-based direct energy deposition
- 2020Porous materials additively manufactured at low energycitations
- 2020Fabrication of millimeter-long structures in sapphire using femtosecond infrared laser pulses and selective etchingcitations
- 2019An Overview: Laser-Based Additive Manufacturing for High Temperature Tribologycitations
- 2019Laser metal deposition of vanadium-rich high speed steel: Microstructuraland high temperature wear characterizationcitations
- 2019Investigation of the ultrashort pulsed laser processing of zinc at 515 nmcitations
- 2019Fabricating Laser-Induced Periodic Surface Structures on Medical Grade Cobalt–Chrome–Molybdenumcitations
- 2019Wear characterization of multilayer laser cladded high speed steelscitations
- 2019Directed energy deposition and characterization of high-carbon high speed steelscitations
- 2018Wear characterization of thick laser cladded high speed steel coatings
- 2018Development and characterization of multilayer laser cladded high speed steelscitations
- 2018Morphology of single picosecond pulse subsurface laser-induced modifications of sapphire and subsequent selective etchingcitations
Places of action
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article
Directed energy deposition and characterization of high-carbon high speed steels
Abstract
<p>Directed energy deposition (DED) of two high-carbon high speed steel alloys Fe<sub>bal</sub>-C-Cr-Mo-V and Fe<sub>bal−x</sub>-C-Cr-Mo-V-W<sub>x</sub> was performed by using a 4 kW Nd:YAG laser source. The purpose of additive manufacturing was design and evaluation of thermally stable – high temperature wear resistant alloys. High temperature (500 °C) pin-on-disc tests were conducted to investigate the effect of carbides phase fraction on friction and wear. Strain scanning of the powder and additively manufactured materials was carried out by Neutron diffraction. Microstructures of both alloys consisted of a martensitic matrix with networks of primary and eutectic carbides. Micro-hardness (0.5 HV) measurement of all multilayer laser deposits, showed a micro-hardness greater than 700 HV, with no detrimental effect of repetitive laser thermal cycling. Fe<sub>bal−x</sub>-C-Cr-Mo-V-W<sub>x</sub> showed a better high temperature wear resistance due to greater phase fraction of VC and Mo<sub>2</sub>C carbides. Fracture surfaces of post-heat treated tensile samples of Fe<sub>bal</sub>-C-Cr-Mo-V and Fe<sub>bal−x</sub>-C-Cr-Mo-V-W<sub>x</sub> revealed brittle failures with minimal plasticity. Neutron strain mapping of the metal powders and the additively manufactured materials resulted in a weak diffraction signal and peak widening effect. These results could be explained either by an effect of strong crystallographic texture in the bulk or by the presence of nano- or semi-crystalline phases.</p>