Dr.-Ing. Annika Bohlen

Head of Materials and Process Technology
e-mail: Bohlen@bias.de
phone:  +49 421 218-58110

ORCID : 0000-0002-1984-5818
directly to the department
portrait Annika Bohlen

Research topics

My research work focuses on the powder and wire-based DED processes for iron, aluminum and titanium alloys. The main focus is on process behavior and process monitoring, as well as investigations of the microstructure formation in additive processes.

Professional background

  • since 2026 Head of Materials and Process Technology
  • 2019-2016 group leader at BIAS; 
  • since 05/2017 scientific assistant at BIAS
  • 2010 - 2017 studies at University of Bremen, systems engineering, focus: production technology

  • Selected Publications

    Bohlen, A.; Seefeld, T 

    Influence of the Inner Roughness of Powder Channels on the Powder Propagation Behavior in Laser Metal Deposition Journal of Laser Applications 36, 042007 (2024). DOI: 10.2351/7.0001570 (OA)

    Bohlen, A.; Seefeld, T

    Haghshenas, A; Groll, R, Characterization of the powder stream propagation behavior of a discrete coaxial nozzle for Laser Metal Deposition Journal of Laser Applications 34 (2022) 42048. DOI: 10.2351/7.0000775 (OA)

    Hildinger, P; Seefeld, T; Bohlen, A.

    Image based in-process powder stream monitoring during Laser Metal Deposition for the measurement of the gravimetric powder mass flow rate and the detection of deviations in the powder stream Procedia CIRP 124 (2024) 219–222. DOI: 10.1016/j.procir.2024.08.103 (OA)

    Warneke, P., Westermeyer, L., Bohlen, A.; Seefeld, T. 

    Influencing the Powder Particle Incorporation in High-Speed Laser Melt Injection, Advanced Engineering Materials (2025) 000:e202501434. DOI: 10.1002/adem.202501434

    Bohlen, A.; Freiße, H.; Hunkel, M.; Vollertsen, F.

    Additive manufacturing of tool steel by laser metal deposition, Procedia CIRP 74 (2018) 192–195. DOI: 10.1016/j.procir.2018.08.092 (OA)

    Langebeck, A.; Bohlen, A.; Rentsch, R.; Vollertsen, F.

    Mechanical Properties of High Strength Aluminum Alloy EN AW-7075 Additively Manufactured by Directed Energy Deposition Metals 10 (2020) 579. DOI: 10.3390/met10050579 (OA)

    Bohlen, A.; Seefeld, T.

    Adaptive powder nozzle setup for enhanced efficiency in laser metal deposition, Journal of Laser Applications 36 (2024). DOI: 10.2351/7.0001183 (OA)

    Epp, J.; Dong, J.; Meyer, H.; Bohlen, A.

    Analysis of cyclic phase transformations during additive manufacturing of hardenable tool steel by in-situ X-ray diffraction experiments, Scripta Materialia 177 (2020) 27–31. DOI: 10.1016/j.scriptamat.2019.09.021

    Freiße, H.; Bohlen, A.; Seefeld, T.

    Determination of the particle content in laser melt injected tracks. Journal of Materials Processing Technology 267 (2019) 177–185. DOI: 10.1016/j.jmatprotec.2018.12.018

    Zhang, X. X.; Walz, E.; Langebeck, A.; Kornmeier, J. R.; Kriele, A.; Luzin, V.; Adveev, M.; Bohlen, A.; Hofmann, M.

    Macroscopic and Microscopic Residual Stresses in Nickel-Aluminum Bronze Matrix Composite Surface Deposits Manufactured via Laser Melt Injection

    Acta Metallurgica Sinica (English Letters) 38 (2025) 570–586. (DOI: 10.1007/s40195-025-01829-x)


    ORCID : 0000-0002-1984-5818


    An overview of BIAS scientific publications can be found here.