Using X-Rays and Neutrons for Materials Characterization › Chair of Materials Science and Engineering for Metals

Target-oriented materials development is based on a profound understanding of the process-inherent mechanisms. This project aims on in-situ observation of the material consolidation process during additive manufacturing. This includes particular phase transformations and the nucleation and growth of precipitates. The observation of these phenomena is a big challenge due to their high temporal dynamics. New experimental environments allow the observation of the formation of the microstructure of a material under process conditions. The competence anchor DESY-FAU DHW, a cooperation between FAU and the Helmholtz centers DESY and DHW, provides access to this accelerator based experimental environment allows.

Contact:

Dr.-Ing. Christopher Zenk

Interior view of the PETRA III experimental hall.
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FokuView along the storage ring PETRA III with bending magnets (blue), focussing magnets (red) and undulators (yellow) in the range of the photon experimental hall.
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Scheme of the experimental setup for thermal alternating tests
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Changes in the scatter pattern of CMSX-4 after repeated heating and quenching
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Development of diffraction angles and lattice parameters during the selectiv laser melting process
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Development of the particle size distribution during isothermal aging at 500 °C calculated from small angle scattering data
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Interior view of the PETRA III experimental hall.

FokuView along the storage ring PETRA III with bending magnets (blue), focussing magnets (red) and undulators (yellow) in the range of the photon experimental hall.

Scheme of the experimental setup for thermal alternating tests

Changes in the scatter pattern of CMSX-4 after repeated heating and quenching

$Development of diffraction angles and lattice parameters during the selectiv laser melting process$

Publications:

Krohmer E., Schmeiser F., Wahlmann B., Rosigkeit J., Graf G., Spoerk-Erdely P., Clemens H., Staron P., Körner C., Reimers W., Uhlmann E.:
Revealing dynamic processes in laser powder bed fusion with in situ X-ray diffraction at PETRA III
In: Review of Scientific Instruments 93 (2022)
ISSN: 0034-6748
DOI: 10.1063/5.0077105
Ioannidou C., König HH., Semjatov N., Ackelid U., Staron P., Körner C., Hedström P., Lindwall G.:
In-situ synchrotron X-ray analysis of metal Additive Manufacturing: Current state, opportunities and challenges
In: Materials and Design 219 (2022), Article No.: 110790
ISSN: 0261-3069
DOI: 10.1016/j.matdes.2022.110790
Wahlmann B., Krohmer E., Breuning C., Schell N., Staron P., Uhlmann E., Körner C.:
In‐situ Observation of γ' Phase Transformation Dynamics during Selective Laser Melting of CMSX‐4
In: Advanced Engineering Materials (2021)
ISSN: 1438-1656
DOI: 10.1002/adem.202100112
Wahlmann B., Galgon F., Stark A., Gayer S., Schell N., Staron P., Körner C.:
Growth and coarsening kinetics of gamma prime precipitates in CMSX-4 under simulated additive manufacturing conditions
In: Acta Materialia (2019)
ISSN: 1359-6454
DOI: 10.1016/j.actamat.2019.08.049