| 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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Kolpak, Felix
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2024Characterization of Tool Surface Properties Generated by Directed Energy Deposition and Subsequent Ball Burnishingcitations
- 2022Entwicklung von Softsensoren für das eigenschaftsgeregelte mehrstufige Presshärten
- 2022Extending the potentials of draw-forgingcitations
- 2022Manufacturing of integrated cooling channels by directed energy deposition for hot stamping tools with ball burnished surfacescitations
- 2022lsothermal high temperature pneumoforming of stainless steel tubes at low pressure levels
- 2022Isothermal hot tube material characterization – Forming limits and flow curves of stainless steel tubes at elevated temperaturescitations
- 2022Anisotropic hardening in cold forging
- 2021Increasing the Lightweight Potential of Composite Cold Forging by Utilizing Magnesium and Granular Corescitations
- 2021Consequences of large strain anisotropic work-hardening in cold forgingcitations
- 2019Flow curves up to high strains considering load reversal and damagecitations
- 2019Predicting weld-quality in direct hot extrusion of aluminium chipscitations
- 2018Prediction of product properties in cold forging considering the Bauschinger effect
- 2018Influence of the Bauschinger effect on the product properties of cold forged parts
- 2017Numerical prediction of the process limits of aluminum chip extrusion
- 2017Improved property prediction of cold forged components by means of enhanced material models
- 2017Manufacturing of reinforced profiles by means of combined continuous and discontinuous composite extrusion
- 2016Potentials and limits of hollow lateral extrusion
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article
Characterization of Tool Surface Properties Generated by Directed Energy Deposition and Subsequent Ball Burnishing
Abstract
<jats:title>Abstract</jats:title><jats:p>By Directed Energy Deposition (DED) a flexible design of cooling channels in forming tools, e.g. hot stamping, with a variety of sizes and a high positioning flexibility compared to machining processes is possible. The subsequent ball burnishing of the tool surfaces in combination with a variation of the DED process parameters enables a control of the tool surface properties and the friction behavior. Parameters such as the ball burnishing pressure or the path overlapping in the DED process are investigated to quantify their effects on roughness, hardness, friction, residual stresses and heat transfer coefficient of generic tool surfaces. The friction coefficient at elevated temperatures depends strongly on the surface roughness of the tool steel surfaces generated by DED and ball burnishing. The latter process improves the surface integrity: the roughness peaks are leveled by up to 75 %, the hardness and the residual stresses are enhanced by up to 20 % and 70 %, respectively. However, the roughness of the tool surfaces is determined mainly by the path overlapping of the welded beads in the DED process. Despite the higher surface roughness, the heat transfer coefficient is in the range of conventionally manufactured tool surfaces of up to 2,700 W/m2K for contact pressures up to 40 MPa. First hot stamping experiments demonstrate that the tools manufactured by the novel process combination are able to manufacture 22MnB5 hat profiles with an increased and more homogenous hardness as well as more homogeneous thickness distribution compared to conventionally manufactured tools.</jats:p>