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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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Pakiela, Zbigniew
Warsaw University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2023The influence of microstructure and texture on the hardening by annealing effect in cold-rolled titaniumcitations
- 2022Comparison of Microstructure, Texture, and Mechanical Properties of TZ61 and AZ61 Mg Alloys Processed by Differential Speed Rollingcitations
- 2022A Comparative Study of Aluminium and Titanium Warm Sprayed Coatings on AZ91E Magnesium Alloycitations
- 2010Microstructure and tensile behavior of Fe–16Al-based alloy after severe plastic deformationcitations
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article
The influence of microstructure and texture on the hardening by annealing effect in cold-rolled titanium
Abstract
The purpose of this study was to compare the influence of microstructural and textural changes on thehardening by annealing effect in cold-rolled titanium. Ultrafine-grained (UFG) Ti Grade 2 was produced bymulti-pass cold rolling (or warm rolling at 400 °C at the final stage) to different thickness reductions (90%,95% and 97%) aimed at varying both the microstructural features of the material (dislocation density, grainsize distribution and grain boundary characteristics) and its texture (the intensity and volume fraction oftexture components). The hardening effect of UFG Ti Grade 2 sheets was obtained by a short-time annealingat 250 °C for 15 min. The highest strengthening, of about 4–5%, was observed for the UFG Ti Grade 2 sheetrolled to 90%; the strengthening gradually decreased for higher thickness reductions (down to ∼ 2% for 97%).The texture intensity and volume fractions of texture components for the annealed UFG Ti Grade 2 sheetswere very close to their as-rolled counterparts, so this did not demonstrate any clear reason for thehardening effect. Instead, the dislocation substructure recovered during annealing at 250 °C, i.e. the dislocationdensity declined significantly, the remaining dislocations became rearranged, and it was easier todifferentiate more nanosized subgrains of about 50–150 nm. The hardening by annealing effect was a resultof the annihilation of mobile dislocations and the ordering of the dislocation substructure, mostly withincoarse grains (> 500 nm). The level of strengthening by low-temperature annealing was mainly affected bythe fraction of coarse grains with a tangled-dislocation substructure in the as-rolled state, i.e. a higherfraction of coarse grains favored more pronounced strengthening. These observations seem to be verypromising for optimizing the cold rolling process and short-time annealing of the UFG Ti Grade 2 sheets,which could be a simple and cost-effective way of enhancing their mechanical properties.