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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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Sun, L.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2021Effect of texture and mechanical anisotropy on flow behaviour in Ti-6Al-4V alloy under superplastic forming conditionscitations
- 2021Unveiling Planar Defects in Hexagonal Group IV Materialscitations
- 2020Chlorides entrapment capability of various in-situ grown NiAl-LDHs: Structural and corrosion resistance propertiescitations
- 2018A novel ultra-high strength maraging steel with balanced ductility and creep resistance achieved by nanoscale β-NiAl and Laves phase precipitatescitations
- 2018The effect of thermomechanical controlled processing on recrystallisation and subsequent deformation-induced ferrite transformation textures in microalloyed steels
- 2017Precipitation in a novel maraging steel F1E:A study of austenitization and aging using small angle neutron scatteringcitations
- 2017A SANS and APT study of precipitate evolution and strengthening in a maraging steelcitations
- 2017A SANS and APT study of precipitate evolution and strengthening in a maraging steelcitations
- 2017Precipitation in a novel maraging steel F1Ecitations
- 2017Is iron unique in promoting electrical conductivity in MOFs?citations
- 2016Insights into microstructural interfaces in aerospace alloys characterised by atom probe tomographycitations
- 2012Aligned silk-based 3-D architectures for contact guidance in tissue engineeringcitations
- 2008Ion irradiation of carbon nanotubes encapsulating cobalt crystalscitations
- 2008Designing silk-based 3D architectures with controlled lamellar morphology
- 2007Crystallization and preliminary crystallographic analysis of an esterese with a novel domein from the hyperthermophile Thermotoga maritimacitations
- 2007Crystallization and preliminary crystallographic analysis of an esterese with a novel domein from the hyperthermophile Thermotoga maritimacitations
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article
Effect of texture and mechanical anisotropy on flow behaviour in Ti-6Al-4V alloy under superplastic forming conditions
Abstract
The dependency of anisotropic flow behaviour on crystallographic texture is investigated in Ti–6Al–4V alloy at 750 °C and 900 °C under constant strain rates of 10−2, 10−3 and 2 × 10−4 s−1. The evolution of microstructure and crystallographic texture during these test conditions has been studied using electron backscatter diffraction (EBSD). Anisotropic flow stress behaviour was observed at 750 °C irrespective of the applied strain rate. The maximum flow stress at this temperature was recorded for samples with their lengths perpendicular to the rolling direction (RD), which had <0001>//Transverse Direction (TD) 20°, Basal TD texture. The presence of a banded microstructure appeared to be the prime reason for the anisotropic tensile behaviours at lower temperatures. However, at the higher temperature of 900 °C isotropic deformation was achieved disregarding sample orientations, i.e., parallel or perpendicular to the RD. Rachinger grain boundary sliding along α-β boundaries, accommodated by intragranular slip, was seen to contribute towards the total strain in samples perpendicular to the RD deformed under 2 × 10−4 s−1 strain rate. As such, Rachinger grain boundary sliding is the dominant deformation mechanism in the direction perpendicular to the RD at 900 °C. On the other hand, although exhibiting isotropic flow behaviour, the same texture is not observed for the samples parallel to the RD at 900 °C under the same strain rate (2 × 10−4 s−1). Thus Rachinger grain boundary sliding is not thought to be the dominating deformation mechanism for this sample orientation and potentially Lifshitz sliding is active. It is concluded that despite not having a strong effect on flow behaviour, microstructural texture determines the mechanism (i.e., Rachinger, Lifshitz) by which the superplastic deformation is driven.