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Article

Carbon Particle In-Situ Alloying of the Case-Hardening Steel 16MnCr5 in Laser Powder Bed Fusion

1
Fraunhofer Institute for Casting, Composite and Processing Technology IGCV, 86159 Augsburg, Germany
2
Faculty of Mechanical Engineering, Technical University of Applied Sciences Ingolstadt, 85049 Ingolstadt, Germany
3
Institute of Machine Elements—Gear Research Centre (FZG), Technical University of Munich, 85748 Garching, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Francisco Paula Gómez Cuevas
Metals 2021, 11(6), 896; https://doi.org/10.3390/met11060896
Received: 15 May 2021 / Revised: 24 May 2021 / Accepted: 25 May 2021 / Published: 31 May 2021
(This article belongs to the Special Issue Advances in Additive Manufacturing of Metals)
The carbon content of steel affects many of its essential properties, e.g., hardness and mechanical strength. In the powder bed fusion process of metals using a laser beam (PBF-LB/M), usually, pre-alloyed metal powder is solidified layer-by-layer using a laser beam to create parts. A reduction of the carbon content in steels is observed during this process. This study examines adding carbon particles to the metal powder and in situ alloying in the PBF-LB/M process as a countermeasure. Suitable carbon particles are selected and their effect on the particle size distribution and homogeneity of the mixtures is analysed. The workability in PBF-LB is then shown. This is followed by an evaluation of the resulting mechanical properties (hardness and mechanical strength) and microstructure in the as-built state and the state after heat treatment. Furthermore, potential use cases like multi-material or functionally graded parts are discussed. View Full-Text
Keywords: additive manufacturing; PBF-LB/M; in situ alloying; case-hardening steel; 16MnCr5; gears; multi-material additive manufacturing; PBF-LB/M; in situ alloying; case-hardening steel; 16MnCr5; gears; multi-material
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MDPI and ACS Style

Schmitt, M.; Gottwalt, A.; Winkler, J.; Tobie, T.; Schlick, G.; Stahl, K.; Tetzlaff, U.; Schilp, J.; Reinhart, G. Carbon Particle In-Situ Alloying of the Case-Hardening Steel 16MnCr5 in Laser Powder Bed Fusion. Metals 2021, 11, 896. https://doi.org/10.3390/met11060896

AMA Style

Schmitt M, Gottwalt A, Winkler J, Tobie T, Schlick G, Stahl K, Tetzlaff U, Schilp J, Reinhart G. Carbon Particle In-Situ Alloying of the Case-Hardening Steel 16MnCr5 in Laser Powder Bed Fusion. Metals. 2021; 11(6):896. https://doi.org/10.3390/met11060896

Chicago/Turabian Style

Schmitt, Matthias, Albin Gottwalt, Jakob Winkler, Thomas Tobie, Georg Schlick, Karsten Stahl, Ulrich Tetzlaff, Johannes Schilp, and Gunther Reinhart. 2021. "Carbon Particle In-Situ Alloying of the Case-Hardening Steel 16MnCr5 in Laser Powder Bed Fusion" Metals 11, no. 6: 896. https://doi.org/10.3390/met11060896

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