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© 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

The thermal conductivity of components manufactured using Laser Powder Bed Fusion (LPBF), also called Selective Laser Melting (SLM), plays an important role in their processing. Not only does a reduced thermal conductivity cause residual stresses during the process, but it also makes subsequent processes such as the welding of LPBF components more difficult. This article uses 316L stainless steel samples to investigate whether and to what extent the thermal conductivity of specimens can be influenced by different LPBF parameters. To this end, samples are set up using different parameters, orientations, and powder conditions and measured by a heat flow meter using stationary analysis. The heat flow meter set-up used in this study achieves good reproducibility and high measurement accuracy, so that comparative measurements between the various LPBF influencing factors to be tested are possible. In summary, the series of measurements show that the residual porosity of the components has the greatest influence on conductivity. The degradation of the powder due to increased recycling also appears to be detectable. The build-up direction shows no detectable effect in the measurement series.

Details

Title
Investigation of Laser Powder Bed Fusion Parameters with Respect to Their Influence on the Thermal Conductivity of 316L Samples
Author
Eichler, Fabian 1   VIAFID ORCID Logo  ; Balc, Nicolae 2   VIAFID ORCID Logo  ; Bremen, Sebastian 3 ; Nink, Philipp 1 

 Department of Mechanical Engineering and Mechatronics, FH Aachen-University of Applied Sciences, 52066 Aachen, Germany; [email protected] (S.B.); [email protected] (P.N.) 
 Department of Manufacturing Engineering, Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania 
 Department of Mechanical Engineering and Mechatronics, FH Aachen-University of Applied Sciences, 52066 Aachen, Germany; [email protected] (S.B.); [email protected] (P.N.); Fraunhofer Institute for Laser Technology ILT, 52074 Aachen, Germany 
First page
166
Publication year
2024
Publication date
2024
Publisher
MDPI AG
e-ISSN
25044494
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3098053775
Copyright
© 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.