Revealing dynamic processes in laser powder bed fusion with in situ X-ray diffraction at PETRA III

Krohmer E, Schmeiser F, Wahlmann B, Rosigkeit J, Graf G, Spoerk-Erdely P, Clemens H, Staron P, Körner C, Reimers W, Uhlmann E (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Review of Scientific Instruments AIP Publishing

Book Volume: 93

Journal Issue: 6

DOI: 10.1063/5.0077105

Abstract

The high flux combined with the high energy of the monochromatic synchrotron radiation available at modern synchrotron facilities offers vast possibilities for fundamental research on metal processing technologies. Especially in the case of laser powder bed fusion (LPBF), an additive manufacturing technology for the manufacturing of complex-shaped metallic parts, in situ methods are necessary to understand the highly dynamic thermal, mechanical, and metallurgical processes involved in the creation of the parts. At PETRA III, Deutsches Elektronen-Synchrotron, a customized LPBF system featuring all essential functions of an industrial LPBF system, is used for in situ x-ray diffraction research. Three use cases with different experimental setups and research questions are presented to demonstrate research opportunities. First, the influence of substrate pre-heating and a complex scan pattern on the strain and internal stress progression during the manufacturing of Inconel 625 parts is investigated. Second, a study on the nickel-base superalloy CMSX-4 reveals the formation and dissolution of gamma' precipitates depending on the scan pattern in different part locations. Third, phase transitions during melting and solidification of an intermetallic gamma-TiAl based alloy are examined, and the advantages of using thin platelet-shaped specimens to resolve the phase components are discussed. The presented cases give an overview of in situ x-ray diffraction experiments at PETRA III for research on the LPBF technology and provide information on specific experimental procedures. Published under an exclusive license by AIP Publishing.

Authors with CRIS profile

Benjamin Wahlmann Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) Carolin Körner Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

Involved external institutions

Technische Universität Berlin DE Germany (DE) Montanuniversität Leoben AT Austria (AT) Helmholtz-Zentrum Hereon DE Germany (DE)

How to cite

APA:

Krohmer, E., Schmeiser, F., Wahlmann, B., Rosigkeit, J., Graf, G., Spoerk-Erdely, P.,... Uhlmann, E. (2022). Revealing dynamic processes in laser powder bed fusion with in situ X-ray diffraction at PETRA III. Review of Scientific Instruments, 93(6). https://dx.doi.org/10.1063/5.0077105

MLA:

Krohmer, Erwin, et al. "Revealing dynamic processes in laser powder bed fusion with in situ X-ray diffraction at PETRA III." Review of Scientific Instruments 93.6 (2022).

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