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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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Denti, Lucia
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2020Technological feasibility of lattice materials by L-PBF of A357.0citations
- 2019Effect of Three Different Finishing Processes on the Surface Morphology and Fatigue Life of A357.0 Parts Produced by Laser‐Based Powder Bed Fusioncitations
- 2018Assay of secondary anisotropy in additively manufactured alloys for dental applicationscitations
- 2018Fatigue behavior of as-built L-PBF A357.0 partscitations
- 2018Evaluation of Laser-Sintered CR-CO and TI Alloys for Dental Applications
- 2018Directed energy deposition of steel 316L: Effects of build orientation
- 2018Additive manufactured A357.0 samples using the laser powder bed fusion technique: Shear and tensile performancecitations
- 2017Effects of build orientation and element partitioning on microstructure and mechanical properties of biomedical Ti-6Al-4V alloy produced by laser sinteringcitations
- 2017Evaluation of Performance of Cast and Laser-Sintered cr-co Alloys for Dental Applications
- 2017Comparative study of three yttria-stabilized zirconia formulations in colored vs natural shades
- 2016Effects of thermal treatments on microstructure and mechanical properties of a Co-Cr-Mo-W biomedical alloy produced by laser sinteringcitations
- 2015Structural characterization of biomedical Co-Cr-Mo components produced by direct metal laser sinteringcitations
- 2014On the Effect of Electrodischarge Drilling on the Fatigue Life of Inconel 718citations
- 2013Investigation into the failure of Inconel exhaust collector produced by laser consolidationcitations
- 2013Studies on electrodischarge drilling of an Al2O3-TiC compositecitations
- 2013Studies on electro discharge drilling of an Al2O3 –TiC compositecitations
- 2010Microwave rapid debinding and sintering of MIM/CIM partscitations
- 2010DMLS DENTAL ALLOYS VS TRADITIONAL TECHNIQUE
- 2009CAST VERSUS LASER-SINTERED CR-CO ALLOYS: STUDY ON MECHANICAL CHARACTERISTICS
- 2009Comparative Mechanical Evaluation Of Three Y-TZP Formulations In Five Shades
- 2008Microwave assisted sintering of green metal partscitations
- 2007Pre-Sintered MIM Brown Parts Obtained by Microwave-Assisted Binder Remova
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article
CAST VERSUS LASER-SINTERED CR-CO ALLOYS: STUDY ON MECHANICAL CHARACTERISTICS
Abstract
Objectives:Additive Layer Manufacture of dental prostheses allows the direct fabrication of parts from CAD data, replacing a human-sensible process with a faster reliable automatic one. Direct Metal Laser Sintering (DMLS) of Cr-Co alloys produces parts to be directly finished with ceramic and employed. Their clinical application requires a solid know-how on mechanical and functional characteristics, with respect to traditional cast parts.Methods:Tensile specimens were built (ASTM E8M) both by DMLS and traditional lost-wax casting, using the same Cr-Co alloy. An experimental plan was designed to evaluate the effect of all process phases. Standard parameters were used on EOSINT-M270 to fabricate the laser-sintered specimens. A group was left as-sintered (DMLS_L) and the others were heat-treated for stress-relief (DMLS). Wax parts were built by drop-on-demand, invested in ceramic and burnt away before casting (CAST). Then, two groups of specimens were subjected to the high temperature treatment used in ceramic covering without deposition (DMLS_H, CAST_H). On all specimens (6 for each of 5 groups) thickness was measured through a measuring microscope. Roughness was determined on Lm=4,8mm. Specimens were tensile tested obtaining UTS and percent elongation.Results:No significant dimensional variations were noticed among different processes. Sintered parts are on average rougher than cast ones (Ra~3.8vs2.6µm). UTS of all sintered specimens (~1400MPa) is almost double than of cast ones, where many porosities were found. Unlike cast parts, heat-treatment increases UTS for DMLS. Laser-sintered specimens are also much more fragile than cast ones (εb~5 vs 20%).Conclusion:DMLS of Cr-Co alloys produces excellent strength and absence of defects with respect to traditional casting. Low εb values are not critical, since deformation of the final prostheses is limited by the ceramic layer fragility. Slightly higher roughness of DMLS parts is likely to improve mechanical bonding with the ceramic layer or might be smoothed.