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Berger, Aaron
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Publications (7/7 displayed)
- 2024Understanding thermophysical properties across length-scales
- 2023A New Experimental Investigation Of The High-Temperature Thermophysical Properties Of Metallic Powders
- 2023A New Approach to the Optimization of the Austenite Stability of Metastable Austenitic Stainless Steelscitations
- 2023Simulation of local metastable microstructural states in large tools: construction and validation of the modelcitations
- 2022Impact of Thermophysical Properties of High-Alloy Tool Steels on Their Performance in Re-Purposing Applicationscitations
- 2021Hot Wear of Single Phase fcc Materials—Influence of Temperature, Alloy Composition and Stacking Fault Energycitations
- 2021Hot wear of single phase fcc materials
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document
A New Experimental Investigation Of The High-Temperature Thermophysical Properties Of Metallic Powders
Abstract
PBF-LB/M is the most suitable process for the additive manufacturing with metallic powders when it comes to complex parts with geometrical accuracy. Nevertheless, some unknown variables are present in the process. Especially the thermal conductivity adds a high degree of uncertainty due to the significant influence of the heat flux from the part to the powder bed on the resulting properties of the part. A lack of experimental data addressing the thermophysical properties of powder and a deep understanding of the influences amplifies this problem. This work presents the thermophysical properties of different steel powders commonly used in the PBF-LB/M process using a newly developed powder container. In a quantitative comparative analysis with the corresponding solid materials, it could be shown that chemical composition and microstructure play a subordinate role in the resulting heat conductivity. Instead, the powder size distribution could be identified as the main parameter determining the emerging behavior.