| 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
In-Situ Observation of Single Variant α Colony Formation in Ti-6Al-4V
Abstract
Much of the current understanding of the β → α + β phase transformation in the commercially important titanium alloy Ti-6Al-4V (Ti64) is by inference from more β-stabilised analogues, or post-mortem studies. In-situ cooling experiments have been conducted for the first time on Ti64 samples, in an adapted SEM with a high temperature heating stage, while performing real-time secondary electron video recording and sequential electron backscatter diffraction mapping. This has enabled direct observation of the development of grain boundary (GB) α colony microstructures, when cooling at relatively low rates (0.3 – 0.1°C s−1) through the β transus. It is shown that the α colonies develop discontinuously, with relatively widely spaced larger ‘primary’ α lamellae nucleating first at lower undercoolings at β GBs, which grow out rapidly into the grains until impingement. These primary laths form a ‘skeletal template’ for the subsequent colonies by determining the variant selected within their domain of influence, as the extent of transformation increases. This occurs through biasing the subsequent sympathetic autocatalytic nucleation of finer secondary α laths combined with branching and plate broadening, to ‘infill’ the remaining β matrix with laths of the same variant. Evidence has also been provided that is in agreement with previous studies of the crystallographic relationships between the nucleating GB α allotriomorph variants, colonies, and the β GBs. However, GB α allotriomorphs were not always found to be a pre-requirement for the development of single variant α colonies in Ti64 (at least when observed at a surface), with the primary α laths seen to nucleate directly off β GBs in competition with the GB α allotriomorphs in many cases.