| 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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Villa, Matteo
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (52/52 displayed)
- 2024Efficient ab initio stacking fault energy mapping for dilute interstitial alloyscitations
- 2023Reconciling experimental and theoretical stacking fault energies in face-centered cubic materials with the experimental twinning stresscitations
- 2023New White Etch Cracking resistant martensitic stainless steel for bearing applications by high temperature solution nitridingcitations
- 2023Process for obtaining a fine-grained martensitic structure component
- 2023Phase Stability and Deformation Modes in Functionally Graded Metastable Austenitic Stainless Steel; A Novel Approach to Evaluate the Role of Nitrogencitations
- 2023Aging 17-4 PH martensitic stainless steel prior to hardeningcitations
- 2023Ab initio study of the effect of interstitial alloying on the intrinsic stacking fault energy of paramagnetic γ-Fe and austenitic stainless steelcitations
- 2022Rapid Screening of the Mechanical Properties of 13 wt%Cr Steels with Uncharted Combinations of C and N Contentscitations
- 2021Targeted heat treatment of additively manufactured Ti-6Al-4V for controlled formation of Bi-lamellar microstructurescitations
- 2021Thermochemical surface hardening of Ti-6Al-4V: On the role of temperature and treatment mediacitations
- 2021Thermochemical surface hardening and self-repair of bulk metallic glass
- 2021Experimental validation of negative stacking fault energies in metastable face-centered cubic materialscitations
- 2020Synchrotron X-ray diffraction investigation of the effect of cryogenic treatment on the microstructure of Ti-6Al-4Vcitations
- 2020High Temperature Solution Nitriding of Stainless Steels; Current Status and Future Trendscitations
- 2020Strain, stress and stress relaxation in oxidized ZrCuAl-based bulk metallic glasscitations
- 2020On the Role of Isothermal Martensite Formation during Cryogenic Treatment of Steelscitations
- 2020Cryogenic treatment of an AISI D2 steel: The role of isothermal martensite formation and “martensite conditioning”citations
- 2019High Temperature Solution Nitriding of Stainless Steels; Current Status and Future Trends
- 2019New Developments in High Temperature Solution Nitriding of Stainless Steels
- 2019High and Low Temperature Surface Hardening of Martensitic Stainless Steels
- 2019Residual stress determination in oxidized bulk metallic glass using X-ray diffraction and FIB/DIC methods
- 2019On the Influence of Deep Cryogenic Treatment on Tempering Transformations in AISI D2 Steels
- 2019Surface hardening by gaseous oxidizing of (Zr55Cu30Al10Ni5)98Er2 bulk-metallic glasscitations
- 2018In-situ analysis of redistribution of carbon and nitrogen during tempering of low interstitial martensitic stainless steelcitations
- 2018Gaseous surface hardening of martensitic stainless steels
- 2018Martensite Formation from Reverted Austenite at Sub-zero Celsius Temperaturecitations
- 2018In Situ Investigation of the Evolution of Lattice Strain and Stresses in Austenite and Martensite During Quenching and Tempering of Steelcitations
- 2018Characterization of oxide layers developed on ZrCuAl-based bulk metallic glasses during gaseous thermochemical treatment
- 2018Surface hardening of Zr-Cu based bulk metallic glasses using gaseous thermochemical treatment
- 2018Activation energy of time-dependent martensite formation in steelcitations
- 2018High temperature gas nitriding of Cr containing martensitic steels
- 2017Thermally activated martensite formation in ferrous alloyscitations
- 2017Kinetics analysis of two-stage austenitization in supermartensitic stainless steelcitations
- 2017Complementary Methods for the Characterization of Corrosion Products on a Plant-Exposed Superheater Tubecitations
- 2017Cryogenic treatment of steel: from concept to metallurgical understanding
- 2017Martensite formation in Fe-C alloys at cryogenic temperaturescitations
- 2016Thermally activated formation of martensite in Fe-C alloys and Fe-17%Cr-C stainless steels during heating from boiling nitrogen temperature
- 2016Sub-Zero Celsius treatment: a promising option for future martensitic stainless steels
- 2016Martensitbildung in Fe-basierten Legierungen während der Erwärmung von Stickstoff-Siedetemperaturcitations
- 2016In Situ Techniques for the Investigation of the Kinetics of Austenitization of Supermartensitic Stainless Steelcitations
- 2015Anomalous kinetics of lath martensite formation in stainless steelcitations
- 2015The sub-zero Celsius treatment of precipitation hardenable semi-austenitic stainless steel
- 2015Thermally activated growth of lath martensite in Fe–Cr–Ni–Al stainless steelcitations
- 2015Investigation of Martensite Formation in Fe Based Alloys During Heating From Boiling Nitrogen Temperature
- 2014Kinetics of anomalous multi-step formation of lath martensite in steelcitations
- 2014Evolution of compressive strains in retained austenite during sub-zero Celsius martensite formation and temperingcitations
- 2014Isothermal Martensite Formation
- 2013In-situ investigation of martensite formation in AISI 52100 bearing steel at sub-zero Celsius temperature
- 2013Enhanced carbide precipitation during tempering of sub-zero Celsius treated AISI 52100 bearing steel
- 2013In situ investigation of the martensitic transformation in Fe–12 wt.%Ni–0.6 wt.%C steel at subzero temperaturescitations
- 2012Martensitic transformation and stress partitioning in a high-carbon steelcitations
- 2011Sub-zero austenite to martensite transformation in a Fe-Ni-0.6wt.%C alloy
Places of action
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conferencepaper
On the Influence of Deep Cryogenic Treatment on Tempering Transformations in AISI D2 Steels
Abstract
The aim of this paper is to investigate the effect of deep cryogenic treatment (DCT) on the tempering behaviour of AISI D2 steel. Dilatometry samples were austenitized at 1030°C for 30min and thereafter quenched at 120°C/min. One set of samples was isochronally tempered at a rate of 6°C/min until 800°C to distinguish four tempering stages: i. precipitation of transition carbides (RT-220°C), ii. precipitation of cementite (220-350°C), iii. decomposition of retained austenite (600-650°C) and iv. precipitation of secondary alloy carbides (450-700°C). In-situ Synchrotron X-Ray Diffraction (S-XRD) investigation of the same tempering cycle shows a reduction of the martensite tetragonality in stage i. In stage ii., retained austenite experiences a marked lattice expansion, which can be ascribed to relaxation of phase-specific compressive stresses (stresses of type II) that had built-up during quenching. Stages iii. and iv. start at approx. 450°C with C depletion of retained austenite, as revealed by an anomalously low thermal expansion of the austenite lattice at T>450°C, and continues with a further relaxation of the martensite structure starting at 540°C. Simultaneously, austenite decomposes into ferrite and secondary alloy carbides, which is completed at 650°C. The effect of DCT, carried out by immersion in boiling nitrogen and soaking at -196°C for various times, can be summarized in a) a shift of transition carbide precipitation to higher temperature, b) a more pronounced volume reduction associated with precipitation of cementite and c) a less pronounced volume expansion associated with (partial) decomposition of RA. Very limited effects (if any) of storage time in boiling nitrogen (i.e. 5min vs 29 h or 72 h) could be observed on dilatometry curves and on the structural parameters of austenite and martensite.