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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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Weißensteiner, Irmgard
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Effect of cold rolling route and annealing on the microstructure and mechanical properties of AISI 316 L stainless steelcitations
- 2024Impact of Surface Microstructure and Properties of Aluminum Electrodes on the Plating/Stripping Behavior of Aluminum-Based Batteries Using Imidazolium-Based Electrolyte
- 2023Processing and microstructure–property relations of Al-Mg-Si-Fe crossover alloyscitations
- 2023Unveiling the strengthening mechanisms of as-cast micro-alloyed CrMnFeCoNi high-entropy alloyscitations
- 2023Precipitation behavior of hexagonal carbides in a C containing intermetallic γ-TiAl based alloycitations
- 2023Fine-grained aluminium crossover alloy for high-temperature sheet formingcitations
- 2022High Fe content in Al-Mg-Si wrought alloys facilitates excellent mechanical propertiescitations
- 2022Mitigating the detrimental effects of galvanic corrosion by nanoscale composite architecture designcitations
- 2021Synergistic alloy design concept for new high-strength Al–Mg–Si thick plate alloyscitations
- 2021Influence of Fe and Mn on the Microstructure Formation in 5xxx Alloys—Part II: Evolution of Grain Size and Texturecitations
- 2021Influence of Fe and Mn on the Microstructure Formation in 5xxx Alloys—Part I: Evolution of Primary and Secondary Phasescitations
- 2020Evolution of microstructure and texture in laboratory- and industrial-scaled production of automotive Al-sheetscitations
- 2020Mg-alloys for forging applications-A reviewcitations
- 2020Mechanism of low temperature deformation in aluminium alloyscitations
- 2019Deformation-induced phase transformation in a Co-Cr-W-Mo alloy studied by high-energy X-ray diffraction during in-situ compression testscitations
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article
Mechanism of low temperature deformation in aluminium alloys
Abstract
This study investigates differences in the deformation mechanisms between room temperature (296 K) and cryogenic temperatures (77 K) and their advantages for low temperature formability in alloys EN AW 1085, EN AW 5182 and EN AW 6016. Compared to room temperature behaviour, tensile tests showed an overall increase in yield strength, ultimate tensile strength and uniform elongation with differences among the principal alloy types. In general, the improved mechanical properties result from higher strain hardening rates at lower temperatures. The application of an extended Kocks-Mecking approach showed a significant reduction of the dynamic recovery and suggested higher dislocation densities upon cryogenic deformation. This was confirmed via in-situ synchrotron experiments, which also reveal a higher proportion of screw dislocations. Moreover, kernel average misorientation maps from electron backscattered diffraction and in-situ cryogenic deformation in a transmission electron microscope displayed a more uniform dislocation arrangement with a reduction of slip lines and less highly misaligned areas after deformation at lower temperatures. Supported by a detailed characterization of the microstructure and its dislocation structure, the associated fundamental mechanisms we reveal, which are at the origin of the exceptional improvement in mechanical properties, are extensively discussed.