| 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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Kirsch, Benjamin
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Micro milling of different workpiece materials with all‑ceramic Y‑TZP and cemented carbide micro end millscitations
- 2023Comparison of different 3Y-TZP substrates for the manufacture of all-ceramic micro end mills with respect to the cutting edge radius and the tool wear
- 2023Surface integrity modification of CoCrMo alloy by deep rolling in combination with sub‐zero cooling as potential implant applicationcitations
- 2022Optimization of the cooling strategy during cryogenic milling of Ti-6Al-4V when applying a sub-zero metalworking fluidcitations
- 2022Optimization of the cooling strategy during cryogenic milling of Ti-6Al-4 V when applying a sub-zero metalworking fluidcitations
- 2022Hybrid manufacturing: influence of material properties during micro milling of different additively manufactured AISI 316Lcitations
- 2020Analysis of the machinability when milling AlSi10Mg additively manufactured via laser-based powder bed fusioncitations
- 2020Micro milling of additively manufactured AISI 316L: impact of the layerwise microstructure on the process resultscitations
- 2020Surface layer hardening of metastable austenitic steel – Comparison of shot peening and cryogenic turning
- 2020Predicting the martensite content of metastable austenitic steels after cryogenic turning using machine learningcitations
- 2020Impact of the thermomechanical load on subsurface phase transformations during cryogenic turning of metastable austenitic steelscitations
- 2020Selective laser melting (SLM) of AISI 316L—impact of laser power, layer thickness, and hatch spacing on roughness, density, and microhardness at constant input energy densitycitations
Places of action
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article
Surface integrity modification of CoCrMo alloy by deep rolling in combination with sub‐zero cooling as potential implant application
Abstract
<jats:title>Abstract</jats:title><jats:p>Alloys made of CoCrMo are well established as implants materials since decades in orthopedic surgery. The good mechanical properties, biocompatibility and especially the corrosion resistance are important rationales for the use of these alloys. Nevertheless, retrieved implants from revision surgery showed the occurrence of abrasion and corrosion. The wear mechanisms and the occurring corrosion processes might be reduced with a functionalization of the surface. The hexagonal phase of the cobalt chromium matrix plays an important role in the surface functionalization. It can be specifically transformed and set during the manufacturing process. One possibility for the induction of the transformation is the use of a deep rolling process in combination with a novel “sub‐zero” cooling strategy during machining. The influence of force and temperature during the deep rolling process on the formation of the hexagonal Co‐phase is examined in this study. The results from the targeted setting of the hexagonal Co‐phase in the subsurface are shown. For this purpose, EBSD studies have been carried out to detect and quantify the proportion of Co‐hex phase in the subsurface of the modified alloys. To analyze the mechanical properties, we measured the residual stress and hardness in the near surface layer under conditions close to the application. Furthermore, we performed biological tests to show a potential influence of the modification on the biocompatibility when using the sub‐zero cooling approach. We observed no negative effect on the osteoblastic cell line which attached similarly to all tested surfaces. The investigations provide first insights into the potential use of “sub‐zero” cooling in modifying orthopedic implant materials, but also the respective limits with regard to the surface functionalization. Deep rolling in combination with an innovative cooling strategy has a great potential to improve the mechanical properties of CoCr28Mo6 wrought alloy, by subsurface hardening and phase transformation.</jats:p>