Comparison of process characteristics and resulting microstructures of maraging steel 1.2709 in Additive Manufacturing via Laser Metal Deposition and Laser Beam Melting in Powder Bed

Karg M, Hentschel O, Ahuja B, Junker D, Haßler U, Schäperkötter C, Haimerl A, Arnet H, Merklein M, Schmidt M (2016)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2016

Publisher: Interesansa - zavod

City/Town: Ljubljana

Pages Range: 39-50

Event location: Nürnberg DE

ISBN: 978-961-285-537-6

Abstract

Laser Metal Deposition (LMD) with Blown Powder and Laser Beam Melting (LBM) in Powder Bed are two Additive Manufacturing technologies that can produce high-quality metal parts in principle. Both technologies are based on melting of fine metal powders employing highintensity laser radiation. Apart from the obvious differences defined by system technology, LMD and LBM differ largely in fundamental boundary conditions of laser-materialinteraction. Process conditions in LMD and LBM and corresponding microstructures were compared on the example of martensitic aging steel 1.2709. This material has been one of the most popular ones in industrial use with LBM for about a decade, typically processed with laser powers below 400 W in continuous wave (cw) mode. With
LMD, 1.2709 has not been commonly used so far. LMD typically engages higher cw laser powers of around 1000 W, larger laser spot diameters and smaller feed rates than LBM. Increased laser power kindles hopes for increased productivity, which is a key factor for economic viability. For a more comprehensive comparison, 1.2709 processed by LBM with 1000 W was also considered. Samples were analyzed metallographically, by computed x-ray tomography, hardness testing before and after heat treatment. Chemical compositions of powder and built samples were compared.

Authors with CRIS profile

Michael Karg Lehrstuhl für Photonische Technologien (LPT) Oliver Hentschel Lehrstuhl für Photonische Technologien (LPT) Bhrigu Ahuja Lehrstuhl für Photonische Technologien (LPT) Daniel Junker Institute of Manufacturing Technology (LFT) Marion Merklein Institute of Manufacturing Technology (LFT) Michael Schmidt Lehrstuhl für Photonische Technologien (LPT)

Additional Organisation(s)

Zentralinstitut für Neue Materialien und Prozesstechnik Erlangen Graduate School in Advanced Optical Technologies (SAOT)

How to cite

APA:

Karg, M., Hentschel, O., Ahuja, B., Junker, D., Haßler, U., Schäperkötter, C.,... Schmidt, M. (2016). Comparison of process characteristics and resulting microstructures of maraging steel 1.2709 in Additive Manufacturing via Laser Metal Deposition and Laser Beam Melting in Powder Bed. In Igor Drstvenšek, Dietmar Drummer, Michael Schmidt (Eds.), Proceedings of the 6th International Conference on Additive Technologies (pp. 39-50). Nürnberg, DE: Ljubljana: Interesansa - zavod.

MLA:

Karg, Michael, et al. "Comparison of process characteristics and resulting microstructures of maraging steel 1.2709 in Additive Manufacturing via Laser Metal Deposition and Laser Beam Melting in Powder Bed." Proceedings of the 6th International Conference on Additive Technologies, Nürnberg Ed. Igor Drstvenšek, Dietmar Drummer, Michael Schmidt, Ljubljana: Interesansa - zavod, 2016. 39-50.

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