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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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Moat, Richard J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (33/33 displayed)
- 2024Residual Stress Map for 75Ni13.5Cr2.7B-3.5Si Clad 316 Stainless Steel
- 2024Mechanical and intergranular corrosion properties of auto TIG welded TP347H-T91 dissimilar weldmecitations
- 2024A class of aperiodic honeycombs with tuneable mechanical properties
- 2023Mechanical characterisation of novel aperiodic lattice structurescitations
- 2020pyCM: An open-source computational framework for residual stress analysis employing the Contour Methodcitations
- 2019The effect of cyclic-loading generated intergranular strains on the creep deformation of a polycrystalline materialcitations
- 2018Substructure Development and Deformation Twinning Stimulation through Regulating the Processing Path during Multi-Axial Forging of Twinning Induced Plasticity Steelcitations
- 2018The influence of temperature on deformation-induced martensitic transformation in 301 stainless steelcitations
- 2017Through-Thickness Residual Stress Profiles in Austenitic Stainless Steel Welds: A Combined Experimental and Prediction Studycitations
- 2017Prediction of residual stresses in girth welded pipes using an artificial neural network approachcitations
- 2017Origin of the Bauschinger effect in a polycrystalline materialcitations
- 2016<i>In situ</i> observation of strain and phase transformation in plastically deformed 301 austenitic stainless steelcitations
- 2015Origin and Effect of Back Stress on Cyclic Creep Deformation of 316H Stainless Steelcitations
- 2014A new method for quantifying anisotropic martensitic transformation strains accumulated during constrained coolingcitations
- 2014Back stress work hardening confirmed by Bauschinger effect in a TRIP steel using bending testscitations
- 2014Effect of Sn on Corrosion Mechanisms in Advanced Zr-Cladding for Pressurised Water Reactorscitations
- 2014An assessment of the mechanisms of transformation plasticity in SA508 Grade 3 steel during simulated welding thermal cyclescitations
- 2013Effect of interpass temperature on residual stresses in multipass welds produced using low transformation temperature filler alloycitations
- 2013The effect of Sn on corrosion mechanisms in advanced Zr-cladding for pressurised water reactors
- 2013ENGIN-X – instrument for materials science and engineering researchcitations
- 2012Linear friction welding of aluminium to magnesiumcitations
- 2012In situ neutron diffraction study of texture evolution and variant selection during the α→β→α phase transformation in Ti–6Al–4Vcitations
- 2012Linear friction welding of aluminium to coppercitations
- 2012Work hardening induced by martensite during transformation-induced plasticity in plain carbon steelcitations
- 2011Detailed diffraction and electron microscopy study of inertia-friction-welded dissimilar high-strength steelscitations
- 2011A comparison of residual stress development in inertia friction welded fine grain and coarse grain nickel-base superalloycitations
- 2011<i>In Situ</i> observation on the influence of ß grain growth on texture evolution during phase transformation in Ti-6A-4Vcitations
- 2011A comparative study of laser direct metal deposition characteristics using gas and plasma-atomized Ti–6Al–4V powderscitations
- 2011Residual stresses in laser direct metal deposited Waspaloycitations
- 2011Design of weld fillers for mitigation of residual stresses in ferritic and austenitic steel weldscitations
- 2009Residual stresses in inertia-friction-welded dissimilar high-strength steelscitations
- 2008Phase transformations across high strength dissimilar steel inertia friction weldcitations
- 2007Stress distributions in multilayer laser deposited Waspaloy parts measured using neutron diffraction
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article
A comparative study of laser direct metal deposition characteristics using gas and plasma-atomized Ti–6Al–4V powders
Abstract
This research presents a comparative study of the characteristics of laser direct metal deposition (LDMD) using two types of Ti–6Al–4V powder. Ti–6Al–4V powders prepared using the gas-atomization (GA) and the plasma rotating electrode (PREP) processes were first analyzed using laser diffraction, scanning electron microscopy and micro computed tomography. A 1.5 kW diode laser with a coaxial deposition head was then used to deposit a number of thin-wall structures at a range of processing parameters from each of the powders. The deposited structures were characterized using optical microscopy, scanning electron microscopy, X-ray diffraction and micro computed tomography (MicroCT). The results show some potential benefits of using PREP powder in laser direct metal deposition. PREP powder has a higher deposition rate and deposits show lower intralayer porosity and lower surface roughness. In both cases, deposits of Ti–6Al–4V exhibit a unique epitaxial prior beta grains microstructure that transforms to alpha lathes and retained beta during cooling. X-ray diffraction results show that the overall microstructure is α + β and not martensitic. The lamellar α + β phase spacing (S<sub>α + β</sub>) increases with laser power but seems unaffected by variation in the mass flow rate of the powder. Micro hardness of the laser deposited Ti–6Al–4V is dependent on the lamellar α + β phase spacing (S<sub>α + β</sub>) and PREP powder deposits show lower micro hardness than GA powder deposits.