Laser beam melting of M50NiL: Influence of inert gas flow on resulting part properties

Scheitler CJ, Rothfelder R, Rasch M, Ahuja B, Schmidt M, Merklein C, Beer O (2016)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2016

Pages Range: 51-60

Conference Proceedings Title: 6th INTERNATIONAL CONFERENCE ON ADDITIVE TECHNOLOGIES - iCAT 2016 - PROCEEDINGS

Event location: Nürnberg

ISBN: 978-961-285-537-6

Abstract

Certain components in aircraft engines like mainshaft bearings have to withstand high loads and
temperatures and have to work reliably at very high rotational speeds. In order to meet the required safety standards these components are made of materials with high rolling contact fatigue properties at elevated temperatures. The case hardening carburizing bearing steel M50NiL with its specific composition and a steel annealing route to ensure maximum cleanliness, is such a material.
Due to various reasons such as lot size or design features, additive manufacturing of these components is sensible. In this paper first results and occurring challenges during
processing of M50NiL by means of laser beam melting in powder bed are presented. Subject of investigations is the reproducibility within single build jobs. The conducted experiments show that the inert gas flow above the process zone has a major influence on the resulting part properties. By analyzing the gas flow and executing necessary modifications on commercially available laser beam melting machinery inhomogeneous process conditions can be eliminated. After the implementation of a specific gas nozzle M50NiL was processed at various inert gas flows and with different process gases. In order to determine the gas flow as major influencing factor and not the heat conduction into
the building platform, varying support strategies have been investigated.

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How to cite

APA:

Scheitler, C.J., Rothfelder, R., Rasch, M., Ahuja, B., Schmidt, M., Merklein, C., & Beer, O. (2016). Laser beam melting of M50NiL: Influence of inert gas flow on resulting part properties. In Igor Drstvenšek, Dietmar Drummer and Michael Schmidt. (Eds.), 6th INTERNATIONAL CONFERENCE ON ADDITIVE TECHNOLOGIES - iCAT 2016 - PROCEEDINGS (pp. 51-60). Nürnberg, DE.

MLA:

Scheitler, Christian Josef, et al. "Laser beam melting of M50NiL: Influence of inert gas flow on resulting part properties." Proceedings of the International Conference on Additive Technologies - icat 2016, Nürnberg Ed. Igor Drstvenšek, Dietmar Drummer and Michael Schmidt., 2016. 51-60.

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