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Advanced process strategy to realize microducts free of powder using selective electron beam melting

  • Christoph R. PobelEmail author
  • Sabrina Reichel
  • Zongwen FuEmail author
  • Fuad Osmanlic
  • Carolin Körner
ORIGINAL ARTICLE
  • 56 Downloads

Abstract

Selective electron beam melting (SEBM) is a powder bed–based additive manufacturing (AM) technology and allows the fabrication of complex metal components. However, the high building temperatures necessary for a stable process prohibit the fabrication of small internal features and intended cavities, e.g., for cooling purposes and heat exchangers. In this work, a novel scan strategy is used to seal prefabricated notches on the surface of Ti-6Al-4V substrates and to create microducts without applying additional materials. Influencing factors are identified and a process map for the SEBM sealing process is established. The impact of the determined strategy on the material properties regarding surface structure and composition is investigated. This sealing process can be followed by conventional SEBM-based additive manufacturing to build complex structures on the sealing layer due to its high flatness.

Keywords

Additive manufacturing Selective electron beam melting Microducts Surface repairing 

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Notes

Acknowledgments

Furthermore, the authors wish to thank Mr. Rudi Borchard from the University of Erlangen-Nuremberg for the generation of V-notches in Ti-6Al-4V plates using laser ablation.

Funding information

Financial support from the Deutsche Forschungsgemeinschaft (DFG, German research foundation) within the Collaborative Research Centre 814, Additive Manufacturing (subproject B2), is gratefully acknowledged.

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Materials Science, Chair of Materials Science and Engineering for Metals (WTM)University of Erlangen-NurembergErlangenGermany

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