| 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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Donoghue, Jack
University of Manchester
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2024In-situ Heating-Stage EBSD Validation of Algorithms for Prior Austenite Grain Reconstruction in Steelcitations
- 2024Exploration of fs-laser ablation parameter space for 2D/3D imaging of soft and hard materials by tri-beam microscopycitations
- 2024Grain-scale in-situ study of discontinuous precipitation in Mg-Alcitations
- 2024Understanding Ag liquid migration in SiC through ex-situ and in-situ Ag-Pd/SiC interaction studiescitations
- 2024Identification, classification and characterisation of hydrides in Zr alloyscitations
- 2024Identification, classification and characterisation of hydrides in Zr alloys
- 2024Biomimetic dual sensing polymer nanocomposite for biomedical applicationscitations
- 2023Development of a high strength liquid assisted healable modified AlMg alloy produced by additive manufacturing
- 2023Development of a high strength liquid assisted healable modified AlMg alloy produced by additive manufacturing
- 2023Characterization of Hydride Precipitation and Reorientation in Zircaloy-4 at Different Metallurgical States
- 2023Mitigation effects of over-aging (T73) induced intergranular corrosion on stress corrosion cracking of AA7075 aluminum alloy and behaviors of η phase grain boundary precipitates during the intergranular corrosion formationcitations
- 2023Development of a new healable aluminium alloy produced by Laser Powder Bed Fusion (LPBF) and improvement of its strength through strengthening element addition
- 2022Large-scale serial sectioning of environmentally assisted cracks in 7xxx Al alloys using femtosecond Laser-PFIBcitations
- 2022Large-scale serial sectioning of environmentally assisted cracks in 7xxx Al alloys using femtosecond Laser-PFIBcitations
- 2022Multi-dimensional study of the effect of early slip activity on fatigue crack initiation in a near-α titanium alloycitations
- 2022Optimising large-area crystal orientation mapping of nanoscale β phase in α + β titanium alloys using EBSDcitations
- 2022CHARACTERISATION OF HYDRIDE PRECIPITATION AND REORIENTATION IN ZIRCALOY-4 AT DIFFERENT METALLURGICAL STATES
- 2021In-Situ Observation of Single Variant α Colony Formation in Ti-6Al-4Vcitations
- 2021Multiscale analysis of grain boundary microstructure in high strength 7xxx Al alloyscitations
- 2020On the Observation of Annealing Twins during Simulating β-Grain Refinement in Ti-6Al-4V High Deposition Rate AM with In-Process Deformationcitations
- 2020Measurement of local plastic strain during uniaxial reversed loading of nickel alloy 625
- 2020Tracking polycrystal evolution non-destructively in 3D by laboratory X-ray diffraction contrast tomographycitations
- 2020On the observation of annealing twins during simulating β-grain refinement in Ti–6Al–4V high deposition rate AM with in-process deformationcitations
- 2019On the application of Xe+ plasma FIB for micro-fabrication of small-scale tensile specimenscitations
- 2019On the application of Xe+ plasma FIB for micro-fabrication of small-scale tensile specimenscitations
- 2019Data for Indirect to direct gap crossover in two-dimensional InSe revealed by angle resolved photoemission spectroscopy
- 2019Indirect to direct gap crossover in two-dimensional InSe revealed by angle-resolved photoemission spectroscopycitations
- 2016The Effectiveness of Combining Rolling Deformation with Wire-Arc Additive Manufacture on β -Grain Refinement and Texture Modification in Ti-6Al-4Vcitations
- 2015Integration of Deformation Processing with Additive Manufacture of Ti-6Al-4V Components for Improved β Grain Structure and Texture
Places of action
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article
Multiscale analysis of grain boundary microstructure in high strength 7xxx Al alloys
Abstract
The size, distribution and chemical composition of grain boundary η-phase precipitates (GBPs) and micro-segregation present in thick plate (140 mm) 7xxx Al alloys has been quantified across a range of length scales. To address the known limitations of individual characterisation methods, a number of cross-correlated, high resolution techniques have been used, including atom probe tomography (APT). A new-generation high-Zn alloy (AA7085) has been compared to a more established material, AA7050, in T7651 temper conditions. The results show that high angle grain boundaries in both alloys are dominated by quench-induced GBPs (Q-GBPs), covering up to ~40% of the area in AA7050. When viewed on brittle intergranular fracture surfaces and in 3D, the Q-GBPs appear much larger than previously reported and exhibit complex branched, dendritic-like morphologies. In AA7050, the Q-GBPs contain substantially higher levels of Cu (by 29 %) and Al (by 37%) and lower Zn (by 33 %) than AA7085. Classical modelling demonstrates that these differences result from different transformation pathways, with precipitates in the more quench sensitive AA7050 alloy nucleating at higher temperatures, which exaggerates the effect of alloy chemistry. In both alloys GB segregation was limited, with low levels of Zn detected relative to the matrix, but more Mg and less Cu in AA7050. It is, therefore, proposed that the higher Cu and Al, and lower Zn content, of the large Q-GBPs present in AA7050 is the main difference in GB microchemistry between the two materials and is the primary reason its GBs are less chemically active. The implications for the relative susceptibilities of the alloys to environmentally assisted cracking are briefly discussed.