Thomas Dahmen

Thomas Dahmen
Technical University of Denmark | DTU · Department of Mechanical Engineering

PhD
Postdoctoral Researcher at DTU Civil and Mechanical Engineering

About

11
Publications
2,995
Reads
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73
Citations
Citations since 2017
11 Research Items
73 Citations
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2017201820192020202120222023051015202530
2017201820192020202120222023051015202530
Introduction
I am a researcher with a passion for sustainable invention, especially in the field of Additive Manufacturing. Focussing on solving real-world engineering challenges, I am experimenting with novel manufacturing technologies to establish new design, process and material relationships.

Publications

Publications (11)
Article
The increasingly complex shapes and geometries being produced using additive manufacturing necessitate new characterization techniques that can address the corresponding challenges. Standard techniques for roughness and texture measurements are inept at characterizing the internal surfaces in freeform geometries. Hence, this work presents a new met...
Conference Paper
Full-text available
Most commercially available laser powder bed fusion (L-PBF) systems are limited to process one material at a time. The ability to spatially apply multiple materials within the same component will strongly expand the available design space for engineers. A typical problem with multi-material components is stress concentration at discrete material in...
Article
Additive Manufacturing (AM) enables the design of complex part geometries for high-temperature applications. Laser Powder Bed Fusion or Direct Energy Deposition of the nickel-based superalloy MAR-M247 poses a challenge in additive manufacturing due to its poor weldability. Binder Jetting does not utilize a heat source and interaction with a liquid...
Thesis
Full-text available
Rising sustainable awareness and regulatory requirements are the main drivers for continuous progress towards more efficient and environmentally friendly solutions in the marine industry. Fossil fuels have to be substituted with alternative fuels such as ammonia, hydrogen, or synthetic fuels in the future. This development poses technological chall...
Article
Full-text available
The laser energy density was believed to control microstructure and mechanical properties of additive-manufactured Inconel 718 (IN718) alloy. However, in this study, remarkable differences were found in the microstructures, tensile mechanical properties, and fracture surfaces of industrial IN718 alloy (with densities higher than 99.75%), which were...
Conference Paper
Full-text available
Additively manufactured channels enable conformal cooling for applications such as injection molds or fuel injectors. Understanding the scalability of these channels for applications of different sizes is essential to pave the way for a more widespread adoption. This work uses a non-destructive testing approach to characterize and compare channels...
Article
Conformal cooling channels, made by the laser powder bed fusion process, are a promising design strategy for optimising cooling and process control of manufacturing tools and injections moulds. The addition of internal features such as corrugations and ribs are becoming an interesting addition to the cooling channel designs. Internal surfaces of la...
Article
Full-text available
In this paper we describe metal additive manufacturing (AM) processes in general, and laser bed fusion processes in particular. The process characteristics are described, and the various modelling approaches demonstrated. The open AM architecture developed at DTU Mechanical Engineering is introduced, as well as an alternative process chain based on...
Conference Paper
Full-text available
Increasingly advanced shapes and geometries are being manufactured using additive manufacturing and new characterization techniques must emerge in order to fully utilize the new possibilities given by freeform design. Cooling channels produced by the laser powder bed fusion process has been shown to have high roughness at overhanging areas due to p...
Conference Paper
Full-text available
Metal additive manufacturing has the potential to enhance the performance of engineering applications by utilizing its inherent design freedom to create complex geometries such as required for conformal cooling. However, additively manufactured channels show significant form deviations when made by laser powder bed fusion. Thereby, not only process...

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