| People | Locations | Statistics |
|---|---|---|
| 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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Pradille, Christophe
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2022Elastoplastic Characterization of Zn-Cu-Ti Alloy Sheets: Experiments, Modeling, and Simulationcitations
- 2021Exploring digital image correlation technique for the analysis of the tensile properties of all-cellulose compositescitations
- 2019Impact of strain rate sensitivity on the identification of the material parameters scattering and on the formability of zinc sheet
- 2015Thermo-mechanical behavior in Poly(methyl methacrylate) with different molecular weights.
- 2015Thermo-mechanical behavior in Poly(methyl methacrylate) with different molecular weights.
- 2014A molecular dynamics simulation study of semi-solid-state Fe: high temperature elasticity and void formation in liquidcitations
- 2011Toward a better understanding of steel behaviour at high temperature
- 2010An experimental study to determine electrical contact resistancecitations
Places of action
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thesis
Toward a better understanding of steel behaviour at high temperature
Abstract
The understanding of solidification crack phenomena would be a challenge. On the one hand, industrial concerns are considerable, in terms of quality and productivity. On the other hand, this is also a scientific challenge, because the physical mechanisms of hot tearing are far from being understood. One of challenges is the rheological characterization of alloys, which is particularly difficult at high temperature and in the semi-solid state (i.e high temperature and very law strain and strain rate). The rheological characterizations in solid and semi solid state are carried out using a direct resistance heating machines (Taboo). The Taboo set up allows cyclic loadings at very low strain rate (10-3 10-4 s-1) between 900°C and the solidus temperature. A specificity of resistance heating machine is a high non thermal homogeneity on central part of sample; this non thermal homogeneity produces a heterogeneous strain. This heterogeneous strain needs to know the displacement field on the sample. All limits of classical measurement technique bring us to develop a new method based on laser produced speckles and to avoid the high temperature problem. In this work we also present a technique of analysing picture based on a cross spectrum method. We have developed a finite element model able to simulate the entire experimental process. This numerical model, first have permitted to help designing optimal sample geometry in order to minimise the temperature gradients throughout the samples. Then the numerical model is also able to simulate the complete tensile test (including the heating with a temperature control by a PID). The results of tensile test and the numerical simulations are both used in an inverse analysis method to identify mechanical parameters of two different steel grades. Finally we have also explored microscopic phenomenon with a molecular dynamics approach. With a such approach, we have determined solid and liquid thermo mechanical properties of Iron like viscosity, elastic properties. We have also explained the cavity formation.