| 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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article
Synchrotron X-ray diffraction investigation of the effect of cryogenic treatment on the microstructure of Ti-6Al-4V
Abstract
Ti-6Al-4V was (intercritically) annealed at various temperatures in the range 1000–1250 K with intervals of 50 K, followed by cooling to room temperature at an average rate of approx. 1 K·s−1. The heat treatment procedure was intended to systematically vary the microstructure and alter the thermal stability of the β phase through the partitioning of the alloying elements between α and β phases. The annealing treatment was followed by cryogenic treatment, CT, which consisted of immersion of the samples in boiling nitrogen for durations ranging from 5 min to 24 h, followed by re-heating in air. The heat-treated material was characterized ex-situ applying light optical microscopy (LOM), synchrotron X-ray diffraction (S-XRD), and hardness Vickers indentation. A set of samples not subjected to cryogenic treatment was taken as reference. LOM revealed that the material’s microstructure after heat treatment consisted of a fraction of primary α grains and regions of lamellar α/β structure. S-XRD showed that the fraction of retained β was largest, approx. 7%, for the material treated at the highest applied annealing temperature, i.e. 1250 K, and decreased to 2% with a reduction of the annealing temperature. Hardness values varied in the range 300–330 HV and did not show a measurable effect of the annealing temperature. The applied techniques did not reveal any measurable effect of cryogenic treatment, neither on the microstructure, nor on the hardness. Additionally, CT had no measurable effect neither on the lattice parameters of the phases, nor on the density of crystallographic defects in the material. These observations are inconsistent with literature data, which report various effects of CT on the microstructure and on the mechanical properties of Ti-6Al-4V, and are attributed to a pronounced stability of the retained β phase against its conversion into α′ martensite during CT in the present heat treatment conditions.