| 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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Derin, Bora
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Topics
Publications (7/7 displayed)
- 2023Understanding passive film degradation and its effect on hydrogen embrittlement of super duplex stainless steel-Synchrotron X-ray and electrochemical measurements combined with CalPhaD and ab-initio computational studiescitations
- 2023The causation of hydrogen embrittlement of duplex stainless steel : Phase instability of the austenite phase and ductile-to-brittle transition of the ferrite phase – Synergy between experiments and modellingcitations
- 2023The Causation of Hydrogen Embrittlement of Duplex Stainless Steel: Phase Instability of the Austenite Phase and Ductile-to-Brittle Transition of the Ferrite Phase – Synergy between Experiments and Modellingcitations
- 2023Understanding Passive Film Degradation and its Effect on Hydrogen Embrittlement of Super Duplex Stainless Steel – Synchrotron X-ray and Electrochemical Measurements combined with CalPhaD and ab-initio Computational Studiescitations
- 2021Directed energy deposition process development for functionally gradient Copper-Inconel 718 materials
- 2020Vacuum oxy-nitro carburizing of tool steels: Structure and mechanical reliability
- 2017Effect of vacuum oxy-nitrocarburizing on the microstructure of tool steels: an experimental and modeling study
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document
Effect of vacuum oxy-nitrocarburizing on the microstructure of tool steels: an experimental and modeling study
Abstract
The thermochemical treatments of tool steels improve the performance of the components with respect to surface hardness, wear and tribological performance as well as corrosion resistance. Compared to the conventional gas ferritic nitrocarburizing process, the original vacuum oxy-nitrocarburizing is a time-, cost-effective and environmentally-friendly gas process. Because of the oxidizing nature of the gas atmosphere, there is no need to perform subsequent post-oxidation.In this study, a vacuum oxynitrocarburizing process was carried out onto four tool steels (AISI H10, H11, H21 and D2) at 570 °C, after hardening and single tempering. The structural analysis of the compound and diffusion layers was performed by optical and electron microscopy, X-ray diffraction and glow discharge optical emission spectrometry (GDOES) methods. A largely monophase ε- layer is formed with a carbon accumulation at the substrate adjacent area. The overlaying oxides adjacent to the ε-carbonitride phase contained Fe3O4 (magnetite) as a main constituent. A thermodynamic modelling approach was also performed to understand and optimize the process. The "Equilib module" of FactSage software which uses Gibbs energy minimization method, was used to estimate the possible products during vacuum oxynitrocarburising process.