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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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Turk, Christoph
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2024Effect of intercritical annealing on the microstructure and mechanical properties of a PH 13-8 Mo maraging steelcitations
- 2024Multiscale in-situ observations of the micro- and nanostructure of a PH 13-8 Mo maraging steel during austenitizationcitations
- 2022Optimization of the post-process heat treatment strategy for a Near-α Titanium base alloy produced by laser powder bed fusioncitations
- 2022Potential Causes for Cracking of a Laser Powder Bed Fused Carbon-free FeCoMo Alloycitations
- 2022Cracking mechanism in a laser powder bed fused cold-work tool steelcitations
- 2022Cracking mechanism in a laser powder bed fused cold-work tool steel: The role of residual stresses, microstructure and local elemental concentrationscitations
- 2022Local microstructural evolution and the role of residual stresses in the phase stability of a laser powder bed fused cold-work tool steelcitations
- 2022Local microstructural evolution and the role of residual stresses in the phase stability of a laser powder bed fused cold-work tool steelcitations
- 2022Microstructure Evolution of a New Precipitation-Strengthened Fe–Al–Ni–Ti Alloy down to Atomic Scalecitations
- 2022Formation and evolution of precipitates in an additively manufactured near-α titanium base alloycitations
- 2022Processability and cracking behaviour of novel high-alloyed tool steels processed by laser powder bed fusioncitations
- 2021Atom Probe Tomography of the Oxide Layer of an Austenitic Stainless CrMnN-Steelcitations
- 2021Influence of thermomechanical fatigue loading conditions on the nanostructure of secondary hardening steelscitations
- 2020Defects in a laser powder bed fused tool steelcitations
- 2020Determination of Martensite Start Temperature of High‐Speed Steels Based on Thermodynamic Calculationscitations
- 2019Microstructural evolution of a dual hardening steel during heat treatmentcitations
- 2019Thermomechanical fatigue testing of dual hardening tool steelscitations
- 2015Boron grain boundary segregation in a heat treatable steelcitations
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article
Cracking mechanism in a laser powder bed fused cold-work tool steel
Abstract
<p>Laser powder bed fusion (LPBF) facilitates economic advantages by enhancing cutting speeds of tools through the implementation of complex internal cooling channels that could not be fabricated otherwise. However, tool steels are prone to cracking during the cyclic remelting process with extremely fast cooling rates due to their high carbon and alloying element contents and related stresses. In this work, a correlation between microscopic crack patterns in a tool steel processed via LPBF, residual stress gradients, local microstructure and near-crack elemental concentrations is studied using longitudinal/transverse sectional synchrotron X-ray micro-diffraction, electron microscopy techniques and atom probe tomography. A formation of horizontal micro-cracks correlates with longitudinal/transverse sectional residual stress drops, especially at geometrically notched positions and sample edges. Remarkably, the cracks propagate predominantly along the network of eutectic intergranular carbides of type M<sub>2</sub>C deposited at the grain boundaries of carbon martensite and retained austenite matrix. A comparison of representative carbide sizes at the crack surfaces and within the crack-free regions indicates that cracks propagate preferably through the carbides in a transcrystalline manner, whereas no correlation between the cracking and the martensite formation is observed. The observations link the crack propagation to the solidification microstructure and the prevailing eutectic network. Therefore, the stress-induced cracking of eutectic carbides, which formed during the solidification and fracture in the solid state due to tensile stress accumulations, was found as the predominant cracking mechanism of the tool steel during the LPBF process.</p>