| 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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Martin, Frantz
CEA Saclay
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024Hydrogen Embrittlement Characterization of 1.4614 and 1.4543 Martensitic Precipitation Hardened Stainless Steels
- 2024Experimental study of the hydrogen-microstructure interactions in a pre-strained 316L austenitic stainless steelcitations
- 2023Effect of surface nitriding on the durability of a Ti-6Al-4V alloy in high temperature pressurized liquid water
- 2022Flow Accelerated Corrosion of titanium alloys in water at 300 °C and 15 MPa
- 2022Experimental assessment of flow accelerated corrosion in nuclear components
- 2022Hydrogen transport in 17-4 PH stainless steel: Influence of the metallurgical state on hydrogen diffusion and trapping
- 2022Effect of nitriding on the corrosion of Ti64 titanium alloy in pressurized water
- 2021Revisiting the effects of low-concentration hydrogen in NiTi self-expandable stentscitations
- 2020Corrosion of titanium alloys in pressurized water at 300 °C and 15 MPa
- 2019Kinetics of hydrogen desorption from Zircaloy-4: Experimental and Modellingcitations
- 2019Hydrogen diffusion and trapping in FCC alloys: a quantitative approach based on experimental data and numerical analysis
- 2019Corrosion of titanium alloys in pressurised water at 300 °C and 350 °C
- 2019Stable isotopes used in the definition of corrosion mechanisms
- 2018Kinetics of hydrogen permeation through a Ni-base alloy membrane exposed to primary medium of pressurized water reactorscitations
- 2018Hydrogen trapping by irradiation-induced defects in 316L stainless steel
- 2017Isotopic tracing of hydrogen transport and trapping in nuclear materialscitations
- 2017Hydrogen trapping by irradiation-induced defects in 316L stainless steel
- 2016Role of grain boundaries in the diffusion of hydrogen in nickel base alloy 600:Study coupling thermal desorption mass spectroscopy with numerical simulationcitations
- 2016Role of grain boundaries in the diffusion of hydrogen in nickel base alloy 600: Study coupling thermal desorption mass spectroscopy with numerical simulationcitations
- 2016Hydrogen diffusion process in the oxides formed on Zirconium Alloys during corrosion in Pressurized Water Reactor Conditionscitations
- 2012Hydrogen Transport in 34CrMo4 Martensitic Steel: Influence of Microstructural Defects on H Diffusioncitations
- 2010A detailed TEM and SEM study of Ni-base alloys oxide scales formed in primary conditions of pressurized water reactorcitations
- 2005In situ AFM study of localised corrosion on a 304L stainless steel
Places of action
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thesis
In situ AFM study of localised corrosion on a 304L stainless steel
Abstract
At this time, the understanding of the initiation of localized corrosion on stainless steels (SS) is still limited. In this context, the present work aimed at observing in situ by Atomic Force Microscopy (AFM) the initiation of corrosion pits and stress corrosion cracking (SCC) cracks. In order to complete the project, a new technique associating an AFM, an electrochemical cell and a traction platform as been developed. It allows in situ imaging of the surface evolutions of a 304L SS at the nanoscale, under controlled potential and/or under stress conditions. We show that corrosion pits initiate preferentially in relation with nanometric defects of the surface. For the first time, a real-time kinetic study of the first steps of nanometric pits growth has been performed. This study coroborates the "point-defect" model (vertical pit growth speed of 0.18 Å.s−1, current densities inside pits evaluated to 73 μA.cm−2). Combined with the EBSD technique (Electron BackScattered Diffraction), the AFM allows a total indexation of the activated slip systems during deformation and give information about the number of emerged dislocations (few units). The effect of strain hardening at the nanoscale on pitting susceptibility has been investigated: 70% of the pits set up at strain hardened areas. To explain this pehnomenoun, we propose a simple model based on the modification of the local work function of the surface due to local stress gradients. Concerning SCC, the first in situ observations seem to validate Magnin's mechanism: crack initiation appears at strain concentration spots. Observed after anodization of our 304L surface, organized arrays of nanocavities (period of 50-100 nm) have been analyzed. In collaboration with an INSERM team, we showed that such nanostructured surfaces increase the adhesion and differenciation of bone cells.