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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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Kontis, Paraskevas
Norwegian University of Science and Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2024Microstructural and Thermomechanical Assessment of Computationally Designed Ni-Based SX Superalloys
- 2023Investigation of the Microstructure of Bismuth Alloy and its Interaction With Cement and Steel Casingcitations
- 2022Chemical redistribution and change in crystal lattice parameters during stress relaxation annealing of the AD730 superalloycitations
- 2021Nanoscale characterisation of hydrides and secondary phase particles in Zircaloy-4citations
- 2021Enhanced creep performance in a polycrystalline superalloy driven by atomic-scale phase transformation along planar faultscitations
- 2021Nucleation mechanism of hetero-epitaxial recrystallization in wrought nickel-based superalloyscitations
- 2020Mechanisms of Ti3Al precipitation in hcp alpha-Ti
- 2020Electronic structure based design of thin film metallic glasses with superior fracture toughnesscitations
- 2020A cracking oxygen story: a new view of stress corrosion cracking in titanium alloys
- 2019Atomic-scale grain boundary engineering to overcome hot-cracking in additively-manufactured superalloyscitations
- 2019Ti and its alloys as examples of cryogenic focused ion beam milling of environmentally-sensitive materialscitations
- 2019Atomistic phase field chemomechanical modeling of dislocation-solute-precipitate interaction in Ni–Al–Cocitations
- 2018Thin-Wall Debit in Creep of DS200 + Hf Alloycitations
- 2018Hot cracking mechanism affecting a non-weldable Ni-based superalloy produced by selective electron Beam Meltingcitations
- 2018Consequences of a Room-Temperature Plastic Deformation During Processing on Creep Durability of a Ni-Based SX Superalloycitations
- 2017On the role of boron on improving ductility in a new polycrystalline superalloycitations
Places of action
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article
On the role of boron on improving ductility in a new polycrystalline superalloy
Abstract
<p>The role of boron in promoting ductility at high temperature in a prototype nickel-based superalloy designed for industrial gas turbines is studied. Both a boron-containing and boron-free variant are tested in tension at 750 °C, with further in-situ tests carried out using scanning electron microscopy (SEM), to clarify the mechanism of ductility improvement. The improvement in ductility is observed to be greater at the lowest investigated strain rate, where the grain boundary character plays a significant role on the mechanical properties; no ductility improvement was observed at the highest investigated strain rate. The in-situ tests were also performed at 750 °C and revealed directly the greater susceptibility of the grain boundary morphology in the boron-free case to fracture and – in the boron-containing case – the mechanism of ductility enhancement. The findings are supported further by high-resolution electron backscattered diffraction (HR-EBSD) strain mapping which confirms that the distribution of elastic strain and geometrically necessary dislocation (GND) content are influenced markedly by boron addition. The mechanism through which boron indirectly enhances the mechanical properties at elevated temperatures is discussed.</p>