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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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Reed, Rc
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2024In-process monitoring and direct simulation of Argon shielding gas and vapour dynamics to control laser-matter interaction in laser powder bed fusion additive manufacturingcitations
- 2024Combined modelling and miniaturised characterisation of high-temperature forging in a nickel-based superalloycitations
- 2023Laser-based additive manufacturing of bulk metallic glasses: recent advances and future perspectives for biomedical applicationscitations
- 2023Oxidation of iron at 600 °C – experiments and simulationscitations
- 2023Physics-based thermal-chemical-fluid-microstructure modelling of in-situ alloying using additive manufacturing: composition-microstructure controlcitations
- 2023Deformation mechanisms rationalisation to design for creep resistance in polycrystalline Ni-based superalloyscitations
- 2023Alloy design for additive manufacturing: early-stage oxidation of nickel-based superalloyscitations
- 2023High-resolution 3D strain and orientation mapping within a grain of a directed energy deposition laser additively manufactured superalloycitations
- 2022Alloys-By-Design: a low-modulus titanium alloy for additively manufactured biomedical implantscitations
- 2022Additive manufacturability of superalloys: Process-induced porosity, cooling rate and metal vapourcitations
- 2022On the solid-state dendritic growth of M7C3 carbide at interfaces in an austenitic systemcitations
- 2021A novel low-modulus titanium alloy for biomedical applications: A comparison between selective laser melting and metal injection mouldingcitations
- 2021Profilometry-based indentation plastometry to obtain stress-strain curves from anisotropic superalloy components made by additive manufacturingcitations
- 2021Characterization of oxidation mechanisms in a family of polycrystalline chromia-forming nickel-base superalloyscitations
- 2020The kinetics of primary alpha plate growth in titanium alloyscitations
- 2020Modelling of the degradation of martensitic stainless steels by the Boudouard reactioncitations
- 2018Grain boundary properties of a nickel-based superalloy: characterisation and modellingcitations
- 2017Nucleation of recrystallisation in castings of single crystal Ni-based superalloys
- 2017On the microtwinning mechanism in a single crystal superalloycitations
- 2016On the composition of microtwins in a single crystal nickel-based superalloycitations
- 2016An Atom Probe Tomography study of site preference and partitioning in a nickel-based superalloycitations
- 2015On the effect of boron on grain boundary character in a new polycrystalline superalloycitations
Places of action
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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.