| 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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Prangnell, Philip
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (41/41 displayed)
- 2024Achieving a columnar-to-equiaxed transition through dendrite twinning in high deposition rate additively manufactured titanium alloyscitations
- 2024In-Situ EBSD Study of Austenitisation in a Wire-Arc Additively Manufactured High-Strength Steelcitations
- 2023Computational study of the geometrical influence of grain topography on short crack propagation in AA7XXX series alloyscitations
- 2023In situ observation of environmentally assisted crack initiation and short crack growth behaviour of new-generation 7xxx series alloys in humid aircitations
- 2023β grain refinement during solidification of Ti-6Al-4V in Wire-Arc Additive Manufacturing (WAAM)citations
- 2023Wire-arc directed energy deposition of Inconel 718: Effects of heat input and build interruptions on mechanical performancecitations
- 2022β Grain refinement by yttrium addition in Ti-6Al-4V Wire-Arc Additive Manufacturingcitations
- 2022Large-scale serial sectioning of environmentally assisted cracks in 7xxx Al alloys using femtosecond Laser-PFIBcitations
- 2022Microstructural characterisation and mechanical properties of Ti-5Al-5V-5Mo-3Cr built by wire and arc additive manufacturecitations
- 2022Optimising large-area crystal orientation mapping of nanoscale β phase in α + β titanium alloys using EBSDcitations
- 2022Optimising large-area crystal orientation mapping of nanoscale β phase in α + β titanium alloys using EBSDcitations
- 2022CALPHAD-informed phase-field model for two-sublattice phases based on chemical potentials: η-phase precipitation in Al-Zn-Mg-Cu alloyscitations
- 2021Co-deformation and dynamic annealing effects on the texture development during alpha–beta processing of a model Zr-Nb alloycitations
- 2021In-Situ Observation of Single Variant α Colony Formation in Ti-6Al-4Vcitations
- 2021The Potential for Grain Refinement of Wire-Arc Additive Manufactured (WAAM) Ti-6Al-4V by ZrN and TiN Inoculationcitations
- 2021Multiscale analysis of grain boundary microstructure in high strength 7xxx Al alloyscitations
- 2021Microstructure transition gradients in titanium dissimilar alloy (Ti-5Al-5V-5Mo-3Cr/Ti-6Al-4V) tailored wire-arc additively manufactured componentscitations
- 2021Effect of deposition strategies on fatigue crack growth behaviour of wire + arc additive manufactured titanium alloy Ti–6Al–4Vcitations
- 2020Process response of Inconel 718 to wire + arc additive manufacturing with cold metal transfercitations
- 2020The effect of processing parameters on rapid-heating β recrystallization in inter-pass deformed Ti-6Al-4V wire-arc additive manufacturingcitations
- 2019Mechanical performance and microstructural characterisation of titanium alloy-alloy composites built by wire-arc additive manufacturecitations
- 2019Automated Image Mapping and Quantification of Microstructure Heterogeneity in Additive Manufactured Ti6Al4Vcitations
- 2017The Effectiveness of Al-Si Coatings for Preventing Interfacial Reaction in Al - Mg Dissimilar Metal Weldingcitations
- 2017Comparison of residual stress distributions in conventional and stationary shoulder high-strength aluminum alloy friction stir weldscitations
- 2016The Effectiveness of Combining Rolling Deformation with Wire-Arc Additive Manufacture on β -Grain Refinement and Texture Modification in Ti-6Al-4Vcitations
- 2016Dissimilar ultrasonic spot welding of aerospace aluminum alloy AA2139 to titanium alloy TiAl6V4citations
- 2016Thermal Modeling of Al-Al and Al-Steel Friction Stir Spot Weldingcitations
- 2016The Effectiveness of Hot Isostatic Pressing for Closing Porosity in Titanium Parts Manufactured by Selective Electron Beam Meltingcitations
- 2016Quantification of the Influence of Increased Pre-Stretching on Microstructure-Strength Relationships in the Al-Cu-Li Alloy AA2195citations
- 2015Coating Design for Controlling Phase IMC Formation in Dissimilar Al-Mg Metal Welding
- 2015Integration of Deformation Processing with Additive Manufacture of Ti-6Al-4V Components for Improved β Grain Structure and Texture
- 2015Automated Multi-Scale Microstructure Heterogeneity Analysis of Selective Electron Beam Melted TiAl6V4 Components:english
- 2014Electrochemical characteristics of a carbon fibre composite and the associated galvanic effects with aluminium alloyscitations
- 2014Electrochemical characteristics of a carbon fibre composite and theassociated galvanic effects with aluminium alloys
- 2013Mechanical and Microstructural Characterization of Percussive Arc Welded Hyper-Pins for Titanium to Composite Metal Joining
- 2013The effect of temperature on the formability of a high strength aluminium automotive alloy
- 2012HAZ development and accelerated post-weld natural ageing in ultrasonic spot welding aluminium 6111-T4 automotive sheetcitations
- 2012Surfi-Sculpt®: The Metallurgical Implication of Electron Beam (EB) Surface Sculpting in Hyper-Joints for Composite to Metal Joining
- 2010Effects of combined Zr and Mn additions on dispersoid formation and recrystallisation behaviour of AA2198 sheetcitations
- 2008Optimisation of Inertia Friction Welding Steel to 6061 Aluminium
- 2000Processing to ultrafine grain structures by conventional routescitations
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.