| 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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Bodner, Sabine C.
Montanuniversität Leoben
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2023Influence of Hatch Strategy on Crystallographic Texture Evolution, Mechanical Anisotropy of Laser Beam Powder Bed Fused S316L Steelcitations
- 2022Graded Inconel-stainless steel multi-material structure by inter- and intralayer variation of metal alloyscitations
- 2022Degradation of regenerated cellulose filaments by hydrogen chloride under aqueous and non-aqueous conditionscitations
- 2022Cracking mechanism in a laser powder bed fused cold-work tool steelcitations
- 2022Effect of cold deformation on the stress corrosion cracking resistance of a high-strength stainless steelcitations
- 2022Local microstructural evolution and the role of residual stresses in the phase stability of a laser powder bed fused cold-work tool steelcitations
- 2021Zerstörungsfreie Charakterisierung von Furnieren für strukturelle Verbundwerkstoffe
- 2021Correlative cross-sectional characterization of nitrided, carburized and shot-peened steelscitations
- 2021Predicting strength of Finnish birch veneers based on three different failure criteriacitations
- 2019Cross-sectional gradients of residual stresses, microstructure and phases in a nitrided steel revealed by 20 µm synchrotron X-ray diffraction
- 2018Combinatorial study of process parameters, microstructure and mechanical properties in Inconel 718 parts produced by additive manufacturing
Places of action
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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>