Conference contribution
(Conference Contribution)


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


Publication Details
Author(s): Karg M, Hentschel O, Ahuja B, Junker D, Haßler U, Schäperkötter C, Haimerl A, Arnet H, Merklein M, Schmidt M
Editor(s): Igor Drstvenšek, Dietmar Drummer, Michael Schmidt
Publisher: Interesansa - zavod
Publishing place: Ljubljana
Publication year: 2016
Pages range: 39-50
ISBN: 978-961-285-537-6

Event details
Event: 6th International Conference on Additive Technologies
Event location: Nürnberg
Start date of the event: 29/11/2016
End date of the event: 30/11/2016
Language: English

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.



Focus Area of Individual Faculties


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.), (pp. 39-50). 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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