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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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Bettge, Dirk
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2023Relevant input data for crack feature segmentation with deep learning on SEM imagery and topography datacitations
- 2022A Round Robin Test To Investigate The Printing Quality Of PBF-LB/M Processed AlSi10Mg
- 2022Electrochemical behaviors of casing steel/mortar interface in CO2 saturated aquifer fluid
- 2022Revealing the nature of melt pool boundaries in additively manufactured stainless steel by nano-sized modulationcitations
- 2021Suitability of Metallic Materials in CC(U)S Applications
- 2021Corrosion Study on Wellbore Materials for the CO2 Injection Processcitations
- 2021Process Induced Preheating in Laser Powder Bed Fusion Monitored by Thermography and Its Influence on the Microstructure of 316L Stainless Steel Partscitations
- 2019On the corrosion mechanism of CO2 transport pipeline steel caused by condensate: Synergistic effects of NO2 and SO2citations
- 2019On the corrosion behaviour of co 2 injection pipe steels: role of cement
- 2019Factors Influencing Droplet Corrosion in Dense Phase CO2
- 2019Defects as a root cause of fatigue failure of metallic components. I: Basic aspectscitations
- 2018Electrochemical study on wellbore constellations for CO2 injection
- 2018Droplet corrosion of CO2 transport pipeline steels
- 2018Droplet corrosion of CO2 transport pipeline steels in simulated oxyfuel flue gascitations
- 2017Interaction of oxidizing and reductive components in CO2 fluids in transport pipelines at low and high pressure and low temperature
- 2016On the corrosion mechanism of CO2 transport pipeline steels caused by impurities: roles of each impure components and benchmarks
- 2008Fatigue behavior and fatigue damage of a Ti-6242/SCS-6 metal matrix composite
- 2008Fatigue behavior and fatigue damage of a Ti-6242/SCS-6 metal matrix composite
- 2007Fatigue behavior and fatigue damage of a Ti-6242/SCS-6 metal matrix composite
- 2001Quantitative description of wear surfaces of disc brakes using interference microscopycitations
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article
Process Induced Preheating in Laser Powder Bed Fusion Monitored by Thermography and Its Influence on the Microstructure of 316L Stainless Steel Parts
Abstract
Undetected and undesired microstructural variations in components produced by laser powder bed fusion are a major challenge, especially for safety-critical components. In this study, an in-depth analysis of the microstructural features of 316L specimens produced by laser powder bed fusion at different levels of volumetric energy density and different levels of inter layer time is reported. The study has been conducted on specimens with an application relevant build height (>100 mm). Furthermore, the evolution of the intrinsic preheating temperature during the build-up of specimens was monitored using a thermographic in-situ monitoring set-up. By applying recently determined emissivity values of 316L powder layers, real temperatures could be quantified. Heat accumulation led to preheating temperatures of up to about 600 °C. Significant differences in the preheating temperatures were discussed with respect to the individual process parameter combinations, including the build height. A strong effect of the inter layer time on the heat accumulation was observed. A shorter inter layer time resulted in an increase of the preheating temperature by more than a factor of 2 in the upper part of the specimens compared to longer inter layer times. This, in turn, resulted in heterogeneity of the microstructure and differences in material properties within individual specimens. The resulting differences in the microstructure were analyzed using electron back scatter diffraction and scanning electron microscopy. Results from chemical analysis as well as electron back scatter diffraction measurements indicated stable conditions in terms of chemical alloy composition and austenite phase content for the used set of parameter combinations. However, an increase of the average grain size by more than a factor of 2.5 could be revealed within individual specimens. Additionally, differences in feature size of the solidification cellular substructure were examined and a trend of increasing cell sizes was observed. This trend was ...