| 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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Teixeira, Julien
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (36/36 displayed)
- 2024Impact of carbon segregation on transition carbides and cementite precipitation during tempering of low carbon steels: Experiments and modelingcitations
- 2024Kinetics and mechanism of austenite decomposition in carbonitrided low-alloy steel
- 2024In situ HEXRD experimental study and prediction of microstructures and internal stresses during heat treatment of carburized and carbonitrided low-alloyed steelscitations
- 2023Numerical Investigations of Phase Transformations Controlled by Interface Thermodynamic Conditions during Intercritical Annealing of Steelscitations
- 2022Carbide-Free Bainite Transformations Above and Below Martensite Start Temperature Investigated by In-Situ High-Energy X-Ray Diffractioncitations
- 2022Microstructure refinement after nitrogen enrichment and austenite decomposition in a low-alloyed steel studied by EBSD and Laser Confocal Scanning Microscopy
- 2022Time-resolved in-situ dislocation density evolution during martensitic transformation by high-energy-XRD experiments: A study of C content and cooling rate effectscitations
- 2022Martensite and nanobainite transformations in a low alloyed steel studied by in situ high energy synchrotron diffractioncitations
- 2022Experimental study of the heat transfer of single-jet impingement cooling onto a large heated plate near industrial conditionscitations
- 2021Carbide-Free Bainite Transformations Above and Below Martensite Start Temperature Investigated by In-Situ High-Energy X-Ray Diffractioncitations
- 2021Advanced EBSD to study phase transformation induced microstructures in carbon and nitrogen enriched 23MnCrMo steel
- 2021Dislocation densities in a low-carbon steel during martensite transformation determined by in situ high energy X-Ray diffractioncitations
- 2021Refinement of bainitic and martensitic microstructures after nitrogen enrichment of a low alloyed steel
- 2021Effect of carbon and nitrogen enrichment in the austenitic field on the formation of microstructures and residual stresses in carburized and carbonitrided low-alloyed steel parts: experimental study and simulation
- 2021Design of new economic secondary precipitating steels for fatigue resistance at elevated service temperatures (SteelSeco) ; Final Technical. Report Part B
- 2021Influence of nitrogen enrichment on the austenite grain growth and decomposition upon cooling in low-alloy steels by in-situ characterization
- 2021Intercritical annealing of cold-rolled ferrite-pearlite steel: Microstructure evolutions and phase transformation kineticscitations
- 2020Dual-Phase Steels: The First Family of Advanced High Strength Steelscitations
- 2020A Physics-Based Mean-Field Model for Ferrite Recovery and Recrystallizationcitations
- 2019Real-Time Investigation of Recovery, Recrystallization and Austenite Transformation during Annealing of a Cold-Rolled Steel Using High Energy X-ray Diffraction (HEXRD)citations
- 2018Nitrogen-induced nanotwinning of bainitic ferrite in low-alloy steelcitations
- 2018Bainite Formation in Carbon and Nitrogen enriched Low Alloyed Steels: Kinetics and Microstructurescitations
- 2018Numerical investigations of the effects of substitutional elements on the interface conditions during partitioning in quenching and partitioning steelscitations
- 2018Isothermal decomposition of carbon and nitrogen-enriched austenite in 23MnCrMo5 low-alloy steelcitations
- 2017The Effects of Nitrogen on Kinetics and Products of Austenite Decomposition in Low-alloy Steel
- 2017Hierarchical criteria to promote fast and selective a GB precipitation at b grain boundaries in b-metastable Ti-alloyscitations
- 2016Simulation of coupled temperature, microstructure and internal stresses evolutions during quenching of a β -metastable titanium alloycitations
- 2016Carbon and nitrogen effects on microstructure and kinetics associated with bainitic transformation in a low-alloyed steelcitations
- 2015Simulation of coupled temperature, microstructure and internal stresses evolutions during quenching of a beta-metastable titanium alloy
- 2014Investigation of the growth kinetics of gamma -> alpha in Fe-C-X alloys with a thick interface modelcitations
- 2014In situ synchrotron X-ray diffraction and dilatometric study of austenite formation in a multi-component steel: Influence of initial microstructure and heating ratecitations
- 2014In situ synchrotron X-ray diffraction and dilatometric study of austenite formation in a multi-component steel: Influence of initial microstructure and heating ratecitations
- 2007Transformation kinetics and microstructures of Ti17 titanium alloy during continuous coolingcitations
- 2006Modeling of the effect of the beta phase deformation on the alpha phase precipitation in near-beta titanium alloyscitations
- 2005Experimental study and modeling of the microstructure evolutions during the cooling after forging in the titanium alloy Ti17
- 2004Prediction of the kinetics of the phase transformations and the associated microstructure during continuous coolingin the Ti17citations
Places of action
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conferencepaper
Refinement of bainitic and martensitic microstructures after nitrogen enrichment of a low alloyed steel
Abstract
Thermochemical surface treatments, such as carburizing are widely used methods for case hardening in order to improve wear resistance, impact strength, and fatigue properties in gear applications. Alternatives to carburizing are nitriding or carbonitriding by diffusing nitrogen into the surface of metals. Previous works have shown that the nitrogen enrichment in austenite has drastic consequences on austenite decomposition, with accelerated kinetics and fine resulting microstructures. This is ascribed to a large variety of nitrides precipitates which form inside the austenitic matrix during the enrichment: micro-sized nitrides at prior austenite grain boundaries and nano-sized intragranular nitrides.While previous works mostly investigated kinetics aspects (dilatometry, HE-XRD) and microstructural characterizations (by TEM), the present study exploits the possibilities offered by orientation-based imaging technique in a scanning electron microscope (EBSD), including in-situ observations at high temperature and the application of crystallographic parent reconstruction method with Merengue software. The challenges are to characterize (by EBSD) multiphase and nanoscale inherited microstructures, often having phases with the same crystal structure (such as CrN, retained austenite, MnS). The purpose is to establish the role of the nitrides on (i) the austenite grain size evolution during re-austenitization and (ii) the nucleation sites of ferrite/bainite upon austenite decomposition during cooling. Note that it seems difficult to determine nucleation sites for martensite (even without the presence of nitrides).The nitrogen-enriched samples (after nitriding and carbonitriding) are found to show drastic austenite grain refinement from 10 µm in the as-enriched samples to 2 µm in the re-austenitised samples. The fine austenite grains combined with the presence of the nitrides have large consequences on the inherited microtextures in the bainite (formed at 400°C) and martensite in terms of spatial organization of the crystallographic variants and presence of proeutectoid ferrite.