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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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Alabort, E.
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Topics
Publications (10/10 displayed)
- 2024Combined modelling and miniaturised characterisation of high-temperature forging in a nickel-based superalloycitations
- 2022Alloys-By-Design: a low-modulus titanium alloy for additively manufactured biomedical implantscitations
- 2021A novel low-modulus titanium alloy for biomedical applications: A comparison between selective laser melting and metal injection mouldingcitations
- 2020Multi-material adhesively bonded structures: Characterisation and modelling of their rate-dependent performancecitations
- 2019In situ diagnostics of damage accumulation in Ni-based superalloys using high-temperature computed tomographycitations
- 2018Combined modelling and miniaturised characterisation of high-temperature forging in a nickel-based superalloycitations
- 2018Grain boundary properties of a nickel-based superalloy: characterisation and modellingcitations
- 2017On the microtwinning mechanism in a single crystal superalloycitations
- 2017On the microtwinning mechanism in a single crystal superalloycitations
- 2015Time-resolved synchrotron diffractometry of phase transformations in high strength nickel-based superalloyscitations
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article
On the microtwinning mechanism in a single crystal superalloy
Abstract
© 2017 Acta Materialia Inc. The contribution of a microtwinning mechanism to the creep deformation behaviour of single crystal superalloy MD2 is studied. Microtwinning is prevalent for uniaxial loading along 〈011〉 at 800°C for the stress range 625 to 675 MPa and 825°C for 625 MPa. Using quantitative stereology, the twin fraction and twin thickness are estimated; this allows the accumulated creep strain to be recovered, in turn supporting the role of the microtwinning mode in conferring deformation. Atom probe tomography confirms the segregation of Cr and Co at the twin/parent interface, consistent with the lowering of the stacking fault energy needed to support twin lengthening and thickening. A model for diffusion-controlled growth of twins is proposed and it is used to recover the measured creep strain rate. The work provides the basis for a thermo-mechanical constitutive model of deformation consistent with the microtwinning mechanism.