| People | Locations | Statistics |
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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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Mottura, Alessandro
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024First-principles calculations of intrinsic stacking fault energies and elastic properties in binary nickel alloyscitations
- 2018First-principles modeling of superlattice intrinsic stacking fault energies in Ni3Al based alloys
- 2018First-principles modeling of the temperature dependence for the superlattice intrinsic stacking fault energies in L12 Ni75-xXxAl25 alloyscitations
- 2018A kinetic Monte Carlo study of vacancy diffusion in non-dilute Ni-Re alloyscitations
- 2017First-principles calculations of thermodynamic properties and planar fault energies in Co3X and Ni3X L12 compoundscitations
- 2016Alloys-by-designcitations
- 2015High resolution energy dispersive spectroscopy mapping of planar defects in L12-containing Co-base superalloyscitations
- 2014Three-dimensional characterization of the permeability of W–Cu composites using a new “TriBeam” techniquecitations
- 2014Can slow-diffusing solute atoms reduce vacancy diffusion in advanced high-temperature alloys?citations
- 2014Nickel-rhenium compound sheds light on the potency of rhenium as a strengthener in high-temperature nickel alloyscitations
- 2014Modelling of the influence of alloy composition on flow stress in high-strength nickel-based superalloyscitations
- 2012A first-principles study of the effect of Ta on the superlattice intrinsic stacking fault energy of L12-Co3(Al,W)citations
- 2010Atom probe tomography analysis of the distribution of rhenium in nickel alloyscitations
- 2010Analysis of atomic-scale phenomena and the rhenium effect in nickel superalloys
- 2008A critique of rhenium clustering in Ni-Re alloys using extended X-ray absorption spectroscopycitations
Places of action
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article
A kinetic Monte Carlo study of vacancy diffusion in non-dilute Ni-Re alloys
Abstract
The beneficial effect of Re on the creep strengthening properties in single crystal Ni-based superalloys is well known, albeit understanding the underlying mechanism is still an ongoing area of investigation. The microstructure in these alloys comprises of cuboids of the hard precipitate phase embedded in a softer matrix phase. At high temperatures, the glide of creep dislocations is restricted to the matrix only, and dislocation climb is required to get around a precipitate. Vacancy diffusion is an essential component of dislocation climb and elements like Re which are slow-diffusing in Ni are expected to affect this phenomenon. In the present work, we aim to study this by calculating the effect of Re composition on the rate of vacancy diffusion in Ni using kinetic Monte Carlo simulations. First principles electronic structure calculations based on density functional theory have been used to calculate the thermodynamic and kinetic parameters in both dilute as well as non-dilute alloys. Results suggest appreciable modification of the vacancy diffusion coefficients, indicating that the beneficial role of Re in Ni-based superalloys can be largely explained by its effect on vacancy diffusion.