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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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Basu, Indranil
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2023Twinning induced spatial stress gradients:Local versus global stress states in hexagonal close-packed materialscitations
- 2022Melt-Pool Dynamics and Microstructure of Mg Alloy WE43 under Laser Powder Bed Fusion Additive Manufacturing Conditionscitations
- 2020High Entropy Alloys:Ready to Set Sail?citations
- 2020Strengthening mechanisms in high entropy alloys:Fundamental issuescitations
- 2018Effect of pulse scheme on the microstructural evolution, residual stress state and mechanical performance of resistance spot welded DP1000-GI steelcitations
- 2018Size dependent plasticity and damage response in multiphase body centered cubic high entropy alloyscitations
- 2018Size dependent plasticity and damage response in multiphase body centered cubic high entropy alloyscitations
- 2018Local stress states and microstructural damage response associated with deformation twins in hexagonal close packed metalscitations
- 2018Local stress states and microstructural damage response associated with deformation twins in hexagonal close packed metalscitations
- 2018BCC-FCC interfacial effects on plasticity and strengthening mechanisms in high entropy alloyscitations
- 2018BCC-FCC interfacial effects on plasticity and strengthening mechanisms in high entropy alloyscitations
- 2017Experimental determination and theoretical analysis of local residual stress at grain scalecitations
- 2017Experimental determination and theoretical analysis of local residual stress at grain scalecitations
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article
Melt-Pool Dynamics and Microstructure of Mg Alloy WE43 under Laser Powder Bed Fusion Additive Manufacturing Conditions
Abstract
<jats:p>Magnesium-based alloy WE43 is a state-of-the-art bioresorbable metallic implant material. There is a need for implants with both complex geometries to match the mechanical properties of bone and refined microstructure for controlled resorption. Additive manufacturing (AM) using laser powder bed fusion (LPBF) presents a viable fabrication method for implant applications, as it offers near-net-shape geometrical control, allows for geometry customization based on an individual patient, and fast cooling rates to achieve a refined microstructure. In this study, the laser–alloy interaction is investigated over a range of LPBF-relevant processing conditions to reveal melt-pool dynamics, pore formation, and the microstructure of laser-melted WE43. In situ X-ray imaging reveals distinct laser-induced vapor depression morphology regimes, with minimal pore formation at laser-scan speeds greater than 500 mm/s. Optical and electron microscopy of cross-sectioned laser tracks reveal three distinct microstructural regimes that can be controlled by adjusting laser-scan parameters: columnar, dendritic, and banded microstructures. These regimes are consistent with those predicted by the analytic solidification theory for conduction-mode welding, but not for keyhole-mode tracks. The results provide insight into the fundamental laser–material interactions of the WE43 alloy under AM-processing conditions and are critical for the successful implementation of LPBF-produced WE43 parts in biomedical applications.</jats:p>