| 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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Orozco-Caballero, Alberto
Universidad Politécnica de Madrid
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2025Twin nucleation at grain boundaries in Mg analyzed through in situ electron backscatter diffraction and high-resolution digital image correlationcitations
- 2023Accurate determination of active slip systems for improved geometrical criteria of basal-to-basal slip transfer at grain boundaries in pure Mgcitations
- 2020High Strain Rate Superplasticity of WE54 Mg Alloy after Severe Friction Stir Processingcitations
- 2018Back-stresses and geometrical hardening as competing mechanisms enhancing ductility in HCP metalscitations
- 2018Back-stresses and geometrical hardening as competing mechanisms enhancing ductility in HCP metalscitations
- 2018Enabling high resolution strain mapping in zirconium alloyscitations
- 2018Enabling high resolution strain mapping in zirconium alloyscitations
- 2018On the ductility of alpha titanium: The effect of temperature and deformation modecitations
- 2018On the ductility of alpha titanium: The effect of temperature and deformation modecitations
- 2017Grain size versus microstructural stability in the high strain rate superplastic response of a severely friction stir processed Al-Zn-Mg-Cu alloycitations
- 2017Influence of Grain Coarsening on the Creep Parameters During the Superplastic Deformation of a Severely Friction Stir Processed Al-Zn-Mg-Cu Alloycitations
- 2017How magnesium accommodates local deformation incompatibility: a high-resolution digital image correlation studycitations
- 2017Evaluation of the mechanical anisotropy and the deformation mechanism in a multi-pass friction stir processed Al-Zn-Mg-Cu alloycitations
- 2016Strategy for severe friction stir processing to obtain acute grain refinement of an Al-Zn-Mg-Cu alloy in three initial precipitation statescitations
Places of action
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article
How magnesium accommodates local deformation incompatibility: a high-resolution digital image correlation study
Abstract
The plastic deformation of single crystal magnesium is strongly anisotropic. This gives rise to deformation incompatibilities between grains during polycrystalline deformation, which are thought to limit ductility and formability. Wrought polycrystalline magnesium alloys are far from brittle, especially in uniaxial tension, implying that these incompatibilities can be accommodated to some extent, although it is not clear how. We have used high-resolution digital image correlation (HRDIC), supported by electron backscatter diffraction (EBSD), to study quantitatively and at the microstructural scale the accommodation of deformation incompatibility in the AZ31 magnesium alloy. Using a new gold remodelling procedure that improves the spatial resolution to 44 nm, we quantified the deformation heterogeneity after a small stretch in uniaxial tension. Our results confirm that polycrystalline deformation is very heterogeneous, with local axial true strains at grain boundaries 32 times higher than the applied average strain of 0. 027, and 18 times higher at slip bands within grains. The local and macroscopic deformation gradients are very different in character as well as magnitude. The resultant deformation incompatibility is accommodated primarily by gradients in basal slip and the activation of difficult slip in “hard” grains, giving rise to grain breakup, with a smaller contribution by enhanced grain boundary shear and twinning. These results imply that a homogeneous distribution of “hard” and “soft” grains can prevent the development of strain localization and therefore, that controlling texture and microtexture is a powerful way of enhancing the formability of magnesium alloys without reducing their single crystal plastic anisotropy.