| 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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Malard, Benoît
Institutul Naţional al Patrimoniului
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2024Multiscale study of additively manufactured 316 L microstructure sensitivity to heat treatment over a wide temperature rangecitations
- 2024New insights on the origin of grain refinement in 316L additively manufactured alloyscitations
- 2022Multi-scale in situ mechanical investigation of the superelastic behavior of a Cu–Al–Be polycrystalline shape memory alloycitations
- 2022Multi-scale in situ mechanical investigation of the superelastic behavior of a Cu–Al–Be polycrystalline shape memory alloycitations
- 2021Microstructural and Chemical Changes of a Ti-Stabilized Austenitic Stainless Steel After Exposure to Liquid Sodium at Temperatures Between 500 °C and 650 °Ccitations
- 2021Determination of residual stress gradient in a Ti-stabilized austenitic stainless steel cladding candidate after carburization in liquid sodium at 500 °C and 600 °Ccitations
- 2020Thermal stability of Mg2Si0.55Sn0.45 for thermoelectric applicationscitations
- 2020Spheroidal graphite coalescence during thermal cycling in the ferritic domain of a high-silicon cast iron studied by optical microscopy and X-ray computed tomographycitations
- 2020Coarsening and dendritic instability of spheroidal graphite in high silicon cast iron under thermal cycling in the ferritic domaincitations
- 2020Effect of cast iron microstructure on adherence of an epoxy protectioncitations
- 2019Influence of dislocations on hydrogen diffusion and trapping in an Al-Zn-Mg aluminium alloycitations
- 2019Elastic properties of the α' martensitic phase in the Ti-6Al-4V alloy obtained by additive manufacturingcitations
- 2019Carburization of austenitic and ferritic stainless steels in liquid sodium: Comparison between experimental observations and simulationscitations
- 2019Solid-state phase transformation in a lithium disilicate-based glass-ceramiccitations
- 2018High-Temperature Oxidation of a High Silicon SiMo Spheroidal Cast Iron in Air with <i>In Situ</i> Change in H<sub>2</sub>O Contentcitations
- 2018High-Temperature Oxidation of a High Silicon SiMo Spheroidal Cast Iron in Air with In Situ Change in H 2 O Contentcitations
- 2017Residual stresses induced by laser welding process in the case of a dual-phase steel DP600: Simulation and experimental approachescitations
- 2017Isothermal and Cyclic Aging of 310S Austenitic Stainless Steelcitations
- 2016Relationship between the volume of the unit cell of hexagonal-close-packed Ti, hardness and oxygen content after α-case formation in Ti–6Al–2Sn–4Zr–2Mo–0.1Si alloycitations
- 2016Évaluation des contraintes résiduelles dans l’alliages Ti-6Al-4V mis en forme par SLM
- 2015Microstructure distribution in an AA2050 T34 friction stir weld and its evolution during post-welding heat treatmentcitations
- 2015Microstructure distribution in an AA2050 T34 friction stir weld and its evolution during post-welding heat treatmentcitations
- 2012Advances in martensitic transformations in Cu-based shape memory alloys achieved by in situ neutron and synchrotron X-ray diffraction methodscitations
- 2012Internal stresses in steel plate generated by shape memory alloy insertscitations
- 2012Advances in martensitic transformations in Cu-based shape memory alloys achieved by in situ neutron and synchrotron X-ray diffraction methods ; Use of large scale facilities for research in metallurgycitations
- 2011In-situ investigation of the fast microstructure evolution during electropulse treatment of cold drawn NiTi wirescitations
- 2011In situ synchrotron analysis of lattice rotations in individual grains during stress-induced martensitic transformations in a polycrystalline CuAlBe shape memory alloycitations
Places of action
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article
In-situ investigation of the fast microstructure evolution during electropulse treatment of cold drawn NiTi wires
Abstract
Microstructure changes taking place during the heat treatment of cold-worked NiTi alloy are of key interest in SMA technology since they are responsible for setting the austenite shape and functional properties of the heat treated alloy. Although these microstructure changes probably occur with extremely fast kinetics, conventional heat treatments of NiTi in a furnace commonly last for several minutes or hours. Short heat treatments can be performed e.g. via Joule heating by electric current or by laser treatments. In this work, microstructure changes taking place during non-conventional fast heat treatment of thin NiTi filaments by short pulse of controlled electric power were investigated by high speed in-situ synchrotron X-ray diffraction with simultaneous evaluation of tensile force and electrical resistance of the treated wire. The results provide direct experimental evidence on the evolution of the internal strain (stress) and density of defects during the fast heating of the wire from 20°C to ~700°C. This evidence is used, together with the earlier reported results of TEM investigations of microstructures in treated wires, to identify a sequence of dynamic processes responsible for the microstructure changes during the fast heating. Based on this knowledge an interpretation of the experimentally recorded variation of the tensile stress and electric resistance during the treatment is proposed.