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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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Sivaswamy, Giribaskar
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2023Effect of heat treatments on microstructure and mechanical properties of low-cost Ti-6Al-4V alloy produced by thermo-mechanical powder consolidation routecitations
- 2023Miniaturised experimental simulation of open-die forgingcitations
- 2022An innovative constitutive material model for predicting high temperature flow behaviour of inconel 625 alloycitations
- 2022An analysis of the forgeability of Ti-10V-2Fe-3Al β titanium alloy using a combined Estrin Mecking and Avrami material constitutive modelcitations
- 2021A novel cyclic thermal treatment for enhanced globularisation kinetics in Ti-6Al-4V alloycitations
- 2021Effect of texture and mechanical anisotropy on flow behaviour in Ti-6Al-4V alloy under superplastic forming conditionscitations
- 2021A new route for developing ultrafine-grained Al alloy strips using repetitive bending under tensioncitations
- 2020Formability of AA-7075 sheets subjected to repetitive bending under tension
- 2020Mechanical response and microstructure evolution of commercially pure titanium subjected to repetitive bending under tensioncitations
- 2018Design and validation of a fixture for positive incremental sheet formingcitations
- 2018Effect of deformation-induced adiabatic heating on microstructure evolution during open-die screw press forging of Ti-6Al-4V.
- 2017Effect of incremental equal channel angular pressing (I-ECAP) on the microstructural characteristics and mechanical behaviour of commercially pure titaniumcitations
- 2017Microstructure and mechanical properties of Al-1050 during incremental ECAPcitations
- 2014Complex Incremental Sheet Forming Using Back Die Support on Aluminium 2024, 5083 and 7075 alloyscitations
- 2014Improvement in ductility in commercially pure titanium alloys by stress relaxation at room temperaturecitations
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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.