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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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Sirvin, Quentin
IMT Mines Albi
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Effect of oxygen dissolution on the mechanical behavior of thin Ti-6Al-4V specimens oxidized at high temperature: Experimental and modelling approachcitations
- 2024Increase in elastic and hardness anisotropy of titanium with oxygen uptake due to high temperature oxidation: A multimodal framework using high speed nanoindentation mappingcitations
- 2023Strain localization in Ti and Ti-alloys using three-dimensional topographic imaging
- 2023Effect of oxygen content on the sub-grain nanoindentation response in titanium affected by high temperature oxidation
- 2023Oxygen content effect on mechanical behaviour of cp titanium exposed at elevated temperature.
- 2020Oxygen/nitrogen-assisted degradation of the mechanical behavior of titanium alloys exposed at elevated temperaturecitations
- 2019Oxygen/nitrogen-assisted degradation of the mechanical behavior of titanium alloys exposed at elevated temperaturecitations
- 2019Digital Image Correlation method for monitoring tensile tests at high temperature. Part 1: comparing the speckle quality produced by various methods at high temperature
- 2018Study of the mechanical behavior of titanium sheets alloys and process parameters in hot stamping operations
- 2017Mechanical Behavior And Modelisation Of Ti-6Al-4V Titanium Sheet Under Hot Stamping Conditionscitations
Places of action
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conferencepaper
Digital Image Correlation method for monitoring tensile tests at high temperature. Part 1: comparing the speckle quality produced by various methods at high temperature
Abstract
National audience ; In order to improve the thermo-mechanical models proposed for hot forming processes, the identification and validation of the numerical simulations could take advantage of continuous kinematic full field measurements achieved during different production steps. This kind of measurements could especially be obtained by Digital Image Correlation. Although this method is relatively mastered at room temperature, it is more complex to implement at high temperature (typically from 600°C to 800°C). This is due to a number of factors, including the mirage effect (phenomena of gradient of refractive index), the loss of image contrast and the speckle flaking observed during thermo-mechanical experiments. This study focus on fabrication methods of speckle and its characteristics at high temperature. The first part introduces different techniques for creating the speckle (paint spraying, anodization, laser engraving and combination between anodization and laser engraving). In order to compare these methods, the same mask (prepared from a synthetic image) is systematically used. The pattern obtained therefore meets certain criteria (density, size, correlation length, etc.) and can be reproduced. Images of the speckled surface are then captured at different temperatures and compared in term of contrast, gray level distribution, etc. The first results show that the speckle obtained by combining laser marking and anodizing leads to better contrast when compared with other techniques at room temperature. However, this result is no more certain at high temperature because of the oxidation layer that develops. In the second part, the adhesion on the surface of a Ti-6Al-4V alloy of the speckles produced using different methods is evaluated. Tensile tests performed at high-temperature with large strain are then performed. In conclusion, a guideline for choosing an appropriate speckle deposition method for studying conditions of hot forming process is suggested. ; L'objectif globale de cet étude est de développer ...