Using X-Rays and Neutrons for Materials Characterization

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.

• 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
• König HH., Semjatov N., Spartacus G., Bidola P., Ioannidou C., Ye J., Renner J., Lienert U., Abreu-Faria G., Wahlmann B., Wildheim M., Ackelid U., Beckmann F., Staron P., Hedström P., Körner C., Lindwall G.:
  MiniMelt: An instrument for real-time tracking of electron beam additive manufacturing using synchrotron x-ray techniques
  In: Review of Scientific Instruments 94 (2023)
  ISSN: 0034-6748
  DOI: 10.1063/5.0177255
• Bidola PM., Abreu-Faria G., Klingenberg J., Brehling J., Burmester H., Tietze U., Krywka C., Staron P., Schwebke B., Lottermoser L., Lindwall G., Ioannidou C., König HH., Spartacus G., Semjatov N., Beckmann F.:
  A high-speed X-ray Radiography Setup for in-situ Electron Beam Powder Bed Fusion at PETRA III
  Advances in X-Ray/EUV Optics and Components XVIII 2023 (San Diego, CA, USA, 22. August 2023)
  In: Hidekazu Mimura, Ali M. Khounsary, Christian Morawe (ed.): Proceedings of SPIE - The International Society for Optical Engineering 2023
  DOI: 10.1117/12.2678913
• Ye J., Semjatov N., Bidola P., Lindwall G., Körner C.:
  Revealing the Mechanisms of Smoke during Electron Beam–Powder Bed Fusion by High-Speed Synchrotron Radiography
  In: Journal of Manufacturing and Materials Processing 8 (2024), Article No.: 103
  ISSN: 2504-4494
  DOI: 10.3390/jmmp8030103