| 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
Development and characterization of multilayer laser cladded high speed steels
Abstract
<p>Two high speed steel (HSS) alloys were laser cladded on 42CrMo<sub>4</sub> steel cylindrical substrate by using a 4 kW Nd:YAG laser source. After optimization of the laser material processing parameters for single layers, multilayered clads were produced. Microstructural characterization of the laser deposits constitutes studies of the carbides and matrix, which was done by using Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Electron Backscattered Diffraction (EBSD) and High Resolution Transmission Electron Microscopy (HRTEM). The strengthening mechanism of LC1 (Fe-Cr-Mo-W-V) was comprised of a martensitic matrix and retained austenite along with networks of VC and Mo<sub>2</sub>C eutectic carbides. Cr enriched fine carbides (Cr<sub>7</sub>C<sub>3</sub> and Cr<sub>23</sub>C<sub>6</sub>) were embedded within the matrix. During laser cladding of the multilayer deposits, cladding of subsequent layers had a detrimental effect on the hardness of previously cladded layers, which was due to tempering of existing lath martensite. To overcome the hardness drop, a new alloy LC2 (Fe<sub>bal−x</sub>-Cr-Mo-W-V-Co<sub>x</sub>) was blended by addition of 3–5% of Co in LC1. The addition of Co resulted in an overall increase in hardness and a reduction in the hardness drop during sequential layer cladding; the latter was due to the presence of Co in the solid solution with Fe. HRTEM was performed to characterize the nanometer-sized precipitates evolved during the re-heating. These carbides were either enriched with V and W or formed from a complex combination of V, Mo, W and Cr with lattice spacings of 0.15 nm to 0.26 nm.</p>