| 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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Kashiwar, Ankush
University of Antwerp
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024Tailoring Mechanical Properties and Shear Band Propagation in ZrCu Metallic Glass Nanolaminates Through Chemical Heterogeneities and Interface Densitycitations
- 2024Tailoring Mechanical Properties and Shear Band Propagation in ZrCu Metallic Glass Nanolaminates Through Chemical Heterogeneities and Interface Densitycitations
- 2024On the role of microstructural defects on precipitation, damage, and healing behavior in a novel Al-0.5Mg2Si alloycitations
- 2024Combining nano-DIC and ACOM TEM to study the ductility enhancement of aluminium films by grain boundary sliding
- 2023Precipitation, damage and healing behaviour in a new healable Al-0.5Mg2Si alloy
- 2023Suppressing hydrogen blistering in a magnesium-rich healable laser powder bed fusion aluminum alloy analyzed by in-situ high resolution techniquescitations
- 2023Controlled precipitation in a new Al-Mg-Sc alloy for enhanced corrosion behavior while maintaining the mechanical performancecitations
- 2022Shear banding-activated dynamic recrystallization and phase transformation during quasi-static loading of beta-metastable Ti-12 wt.% Mo alloycitations
- 2022Healing Damage in Friction Stir Processed Mg2Si reinforced Al alloy
- 2022Design, Friction Stir Processing and characterization of a new healable aluminium alloy
- 2022TEM investigations of deformation mechanisms in nanocrystalline metals and multilayered composites
- 2022Optimisation of the Thermoelectric Properties of Fe2VAl Thin Films Obtained by Co-sputtering
- 2022Shear banding-activated dynamic recrystallization and phase transformation during quasi-static loading of β-metastable Ti – 12 wt % Mo alloy
Places of action
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document
Precipitation, damage and healing behaviour in a new healable Al-0.5Mg2Si alloy
Abstract
Aluminum matrix composites (AMCs) are widely used as structural materials in transportation and aerospace industries due to their high strength and lightweight [1]. The pursuit of improving damage tolerance and the overall lifetime of AMCs has led to the development of damage management approaches and the emergence of healable AMCs [2]. Recently, a novel solid-state healing strategy called programmed damage and repair (PDR) was reported which is based on the incorporation of damage localization particles in the alloy, that act as damage nucleation sites, and a healing heat treatment activates diffusion in the matrix leading to the healing of voids or cracks [3]. In the present study, precipitation, damage, and healing behaviour are investigated in a new healable Al-0.5Mg2Si alloy developed based on the PDR strategy. Al-0.5Mg2Si alloy was designed by friction stir processing (FSP) with predefined parameters [3]. Bright-field transmission electron microscopy (BF-TEM) imaging on the as-FSP specimen revealed the topology of extended defects (dislocations and grain boundaries (GBs)). Quantitative elemental mapping by energy dispersive X-ray spectroscopy in scanning TEM (STEM-EDX) along with high-resolution STEM imaging confirmed the presence of Mg2Si precipitates. Automated crystal orientation mapping in STEM (ACOM-STEM) was used to characterize general GBs as well as sub-grain boundaries in Al-matrix, and correlation with STEM-EDX analysis showed that both GBs and sub-grain boundaries in the grains act as preferential precipitation sites. In situ tensile testing in a scanning electron microscope (SEM) was used to introduce damage in the as-FSP specimen. The damage was evidenced at Mg2Si particles and it was accompanied by an extensive orientation gradient in the Al-matrix ahead of the cracked particles, indicating dislocation-based plasticity and strain accumulation in the matrix eventually leading to the cracking of the particles. In situ TEM heating of the damaged specimen at 350 °C showed healing of the cracked particles assisted by the diffusion of Al-matrix around the crack (Figure 1). The healing processes are associated with recovery, GB migration as well as the transformation of low-angle GBs to high-angle GBs. The evolution of these defects in AMCs offers greater insights into the active mechanisms that lead to the healing capabilities of these AMCs. References [1] A. Poznak, D. Freiberg, P. Sanders Fundamentals of Aluminum Metallurgy, 2018, 333-386. [2] M. Arseenko, J. Gheysen, F. Hannard, N. Nothomb, A. Simar Self-Healing Construction Materials, 2022, 43-78. [3] M. Arseenko, F. Hannard, L. Ding, Lv Zhao, E. Marie, H. Idrissi, A. Simar Acta Materialia, 2022, 238, 118241.