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

Conference contribution
(Conference Contribution)


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
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.



FAU Authors / FAU Editors

Ahuja, Bhrigu
Lehrstuhl für Photonische Technologien
Junker, Daniel
Lehrstuhl für Fertigungstechnologie
Karg, Michael
Lehrstuhl für Photonische Technologien
Merklein, Marion Prof. Dr.-Ing.
Lehrstuhl für Fertigungstechnologie
Schmidt, Michael Prof. Dr.-Ing.
Lehrstuhl für Photonische Technologien


Additional Organisation
Zentralinstitut für Neue Materialien und Prozesstechnik
Erlangen Graduate School in Advanced Optical Technologies


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). 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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Last updated on 2018-19-04 at 03:40