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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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Rittinghaus, Silja-Katharina
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2024Changes in the morphology and chemistry of an oxidation-sensitive beta-Ti alloy powder during the processing steps of additive manufacturing
- 2023Intrinsic Heat Treatment of an Additively Manufactured Medium Entropy AlCrFe2Ni2-Alloycitations
- 2023Towards enhancing ODS composites in laser powder bed fusion: Investigating the incorporation of laser-generated zirconia nanoparticles in a model iron–chromium alloycitations
- 2022Evolution of Surface Topography and Microstructure in Laser Polishing of Cold Work Steel 1.2379 (AISI D2) Using Quadratic, Top-Hat Shaped Intensity Distributionscitations
- 2022Evolution of Surface Topography and Microstructure in Laser Polishing of Cold Work Steel 1.2379 (AISI D2) Using Quadratic, Top-Hat Shaped Intensity Distributionscitations
- 2022Laser Fusion of Powder and Foil - a Multi Material Approach to Additive Manufacturingcitations
- 2022High Temperature Oxidation Performance of an Additively Manufactured Mo-9Si-8B Alloycitations
- 2022Laser Additive Manufacturing of Iron-Aluminum for Hybrid Steam Turbine Blades
- 2022Laser Additive Manufacturing of Iron-Aluminum for Hybrid Steam Turbine Blades
- 2021Strengthening of additively manufactured Me-Si-B (Me = Mo, V) by Y2O3 particlescitations
- 2021Laser Micro Polishing of Tool Steel 1.2379 (AISI D2): Influence of Intensity Distribution, Laser Beam Size, and Fluence on Surface Roughness and Area Ratecitations
- 2021Laser Micro Polishing of Tool Steel 1.2379 (AISI D2): Influence of Intensity Distribution, Laser Beam Size, and Fluence on Surface Roughness and Area Ratecitations
- 2021High Temperature Oxidation Performance of an Additively Manufactured Mo–9Si–8B Alloycitations
- 2021Structure-property-process parameters correlation of laser additive manufactured TiC dispersed titanium aluminide (Ti45Al5Nb0.5Si) compositecitations
- 2021Influence of Process Conditions on the Local Solidification and Microstructure During Laser Metal Deposition of an Intermetallic TiAl Alloy (GE4822)citations
- 2021Influence of Process Conditions on the Local Solidification and Microstructure During Laser Metal Deposition of an Intermetallic TiAl Alloy (GE4822)citations
- 2020Laserauftragschweissen von ɣ-Titanaluminiden als Verfahren der Additiven Fertigung ; Additive manufacturing of γ-titanium aluminides with laser metal deposition
- 2020Recent advances in additive manufacturing of Mo-Si-B alloys – A status report on the cooperative project LextrA -citations
- 2020Laser based manufacturing of titanium aluminidescitations
- 2019Microstructural Evolution and Microhardness of Direct Laser Clad TiC Dispersed Titanium Aluminide (Ti45Al5Nb0.5Si) Alloycitations
- 2019Laser Additive Manufacturing of Titanium Aluminides for Turbomachinery Applicationscitations
- 2019Oxygen gain and aluminum loss during laser metal deposition of intermetallic TiAlcitations
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document
Laser Additive Manufacturing of Titanium Aluminides for Turbomachinery Applications
Abstract
<jats:title>Abstract</jats:title><jats:p>The defect-free processing of TiAl alloy TNM™-B1 by means of Laser Powder Bed Fusion (LPBF) is demonstrated by manufacturing of an automobile turbocharger wheel. Similar precision cast material was used as reference. TNM™-B1 was manufactured crack free with a density > 99.5% using elevated process temperatures above the brittle-to-ductile transient temperature (BDTT). The preheating temperature was provided by an induction preheating system. To minimize oxygen pick up during the LPBF process, the process atmosphere was actively cleaned using a gas-purification system.</jats:p><jats:p>Produced test samples were analyzed in as-built and heat-treated condition regarding density, micro structure and phases by means of a Light Optical Microscope (LOM) and Scanning Electron Microscopy (SEM). Micro hardness was measured according to Vickers. Oxidation measurements were performed by means of carrier-gas hot extraction. Mechanical properties were determined using room temperature tensile tests. The final automobile turbocharger wheel was analyzed for defects using a Micro-Computer Tomography scanner (MCT).</jats:p><jats:p>Besides bulk test samples, thin-walled specimens can be manufactured with sufficient density. Depending on the process parameters, an oxygen content < 1000 ppm could be reached. The as-built microstructure consists of lamellar (α2+γ) colonies and nearly globular γ as well as β/β0 at the grain boundaries. High cooling rates in the magnitude of 105 to 106 K/s provide small grain sizes of 1–7 μm. Hardness measurements reveal an increased hardness (515-560HV0.3) compared to cast material (390HV0.3). Samples for tensile tests show tensile strength around 840 MPa and a total elongation of 1.1% for LPBF-manufactured and hot isostatic pressed (HIP) samples. The CT analysis of the turbocharger wheel confirms that complex geometries made of TiAl can be additively manufactured free of cracks.</jats:p>