| 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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Zhao, Liguo
Loughborough University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2022In silico evaluation of additively manufactured 316L stainless steel stent in a patient-specific coronary arterycitations
- 2022A comparative study of microstructures and nanomechanical properties of additively manufactured and commercial metallic stentscitations
- 2022Development, characterisation, and modelling of processability of nitinol stents using laser powder bed fusioncitations
- 2021Microstructural and mechanical characterization of thin-walled tube manufactured with selective laser melting for stent applicationcitations
- 2020Characterization of biodegradable poly(l‐lactide) tube over accelerated degradationcitations
- 2019Characterisation of additively manufactured metallic stentscitations
- 2019Quantifying the mechanical properties of polymeric tubing and scaffold using atomic force microscopy and nanoindentationcitations
- 2019Mechanical and chemical characterisation of bioresorbable polymeric stent over two-year in vitro degradationcitations
- 20183D DDD modelling of dislocation–precipitate interaction in a nickel-based single crystal superalloy under cyclic deformationcitations
- 2017174 Comparison of the mechanical performance of polymeric and metallic scaffolds – testing and modelling
- 2015Fatigue crack growth in a Nickel-based superalloy at elevated temperature : experimental studies, viscoplasticity modelling and XFEM predictionscitations
- 2015Fatigue crack growth in a nickel-based superalloy at elevated temperature - experimental studies, viscoplasticity modelling and XFEM predictions
- 2011Effects of cyclic stress and temperature on oxidation damage of a nickel-based superalloycitations
Places of action
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document
A comparative study of microstructures and nanomechanical properties of additively manufactured and commercial metallic stents
Abstract
Additive manufacturing emerges as an innovative technology to fabricate medical stents used to treat blocked arteries. However, there is a lack of direct comparison of underlying microstructure and mechanical properties of additively manufactured and commercial stents. In this study, additively manufactured and commercial 316L stainless steel stents were investigated comparatively, with electrochemical polishing being used to improve the surface finish of the former stent. Microstructural characterisation of both stents was carried out through optical microscopy, scanning electron microscopy, and electron backscatter diffraction. Their hardness and elastic modulus were studied using Berkovich nanoindentation, with an emphasis on the effect of grain orientation. In addition, spherical nanoindentation was used to generate indentation stressstrain curves based on load-displacement responses. The obtained results showed that electrochemical polishing was effective in diminishing the average surface roughness, with a reduction of Ra value from 8.45 μm to 5.96 μm. The additively manufactured stent demonstrated the hierarchical grain microstructure with columnar grains and cellular sub-grains, as opposed to equiaxed fine grains and twins in the commercial stent. The hardness and modulus of additively manufactured stents were higher than those of the commercial ones. The grains close to the (111) orientation exhibited the highest hardness and elastic modulus followed by (101) and (001) orientations. The indentation stress-strain curves, yield strength, and hardening behaviour were similar for the additively manufactured and commercial stents. This work provides a fundamental understanding of the microstructure and properties of the additively manufactured stent and represents an important step towards innovative manufacturing of stents.