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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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thesis
Study of the mechanical behavior of titanium sheets alloys and process parameters in hot stamping operations
Abstract
In the aerospace industry, titanium alloys are used for their excellent mechanical behavior associated with low density. They are widely available in sheet form and the final shape can be obtained through three processes: at room temperature by stamping operation, at very high temperatures (T≈900°C) by superplastic forming (SPF) and at intermediate temperature (T=730°C, 880°C) by hot forming (HF). The project is based on the development of the hot stamping process of Ti-6Al-4V titanium alloy sheet under isothermal conditions at temperatures below than 700°C. Therefore, the determination of the process and material parameters constitutes an important stage for implementing the numerical simulation while contributing to the success of the stamping operation at the scale of an industrial part. The process parameters are related to the punch speed, the blank holder forces and the friction induced between the sheet and the tool. Their analysis allowed to determine two temperature levels (400°C et 500°C) leading a drastic drop in energy cost, compared to HF or SPF processes, while maintaining enough elongation levels. The material parameters influencing the behavior of the alloy are analyzed and quantified. They can be influenced by several mechanisms: elasticity, viscosity, anisotropy (Hill48, Barlat91) and nature of hardening (isotropic, kinematic). In this study, an anisotropic elasto-viscoplastic behavior model, able to consider the loading path undergone by sheet during forming, has been formulated for both temperature levels. The implementation of the behavior model is achieved in Abaqus/Standard 6.14® Finite Element code with the material library plugin ZMAT®. It enables, on the one hand, stamping numerical simulations of a simple shape Omega profile for which experimental comparisons were done, on the other hand, calculations on an industrial part with a complex shape.