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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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Chiu, Yu-Lung
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2024In-Situ synchrotron investigation of elastic and tensile properties of oxide dispersion strengthened EUROFER97 steel for advanced fusion reactorscitations
- 2021A study on the phase transformation of γ2-Al8Mn5 to LT-Al11Mn4 during solutionizing in AZ91 alloycitations
- 2021The defect evolution in 1-D shocked tantalum single crystalscitations
- 2021Role of La addition for enhancing the corrosion resistance of Mg–Dy alloycitations
- 2020Mechanical property evaluation of second phase particles in a Mg–8Al-0.5Zn alloy using micropillar compressioncitations
- 2019Mesoscopic quantitative chemical analyses using STEM-EDX in current and next generation polycrystalline Ni-based superalloyscitations
- 2018The defect evolution in shock loaded tantalum single crystalscitations
- 2018In situ synchrotron X-ray diffraction characterization of corrosion products of a Ti-based metallic glass for implant applicationscitations
- 2014Micro-tensile strength of a welded turbine disc superalloycitations
Places of action
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article
Mesoscopic quantitative chemical analyses using STEM-EDX in current and next generation polycrystalline Ni-based superalloys
Abstract
Quantitative chemical analyses of Ni3Al based hardening precipitates (γ′) in polycrystalline Ni based superalloys have been conducted using energy dispersive X-ray spectroscopy (EDX), coupled with a scanning transmission electron microscope (STEM). The aim of the current investigation is (1) to evaluate the accuracy of calibration (k factor determinations and absorption corrections using a combination of differential X-ray absorption (DXA) and convergent beam electron diffraction (CBED)) by comparing with thermodynamic calculations and (2) to demonstrate the importance of the EDX chemical analysis by taking advantage of its unique capabilities to analyse sub-micron scale chemistries within a mesoscopic field of view under STEM. Our experimental findings show good agreement with the mole fraction ratio of γ′ to the disordered γ matrix predicted using the Lever rule on a thermodynamically stabilised unimodal superalloy, RR1000. The significance of analysing a statistically viable number of samples in thermodynamically metastable superalloys and the chemical fluctuations found in coarse γ′, sized above 200 nm on a scale of a few hundred nanometres in the context of solving a complex morphological evolution of γ′ particles is demonstrated.