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


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.


Additive manufacturing Selective electron beam melting Microducts Surface repairing 


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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.


  1. 1.
    Frazier WE (2014) Metal additive manufacturing: a review. J Mater Eng Perform 23(6):1917–1928. CrossRefGoogle Scholar
  2. 2.
    Gibson I, Rosen D, Stucker B (2010) Additive manufacturing technologies – rapid prototyping to direct digital manufacturing, vol 5. Google Scholar
  3. 3.
    Mueller B (2012) Additive manufacturing technologies – rapid prototyping to direct digital manufacturing, vol 32.
  4. 4.
    Fotovvati B, Namdari N, Dehghanghadikolaei A (2018) Fatigue performance of selective laser melted Ti6Al4V components: state of the art. Mater Res Express 6(1):012002. CrossRefGoogle Scholar
  5. 5.
    Shabgard H, Allen MJ, Sharifi N, Benn SP, Faghri A, Bergman TL (2015) Heat pipe heat exchangers and heat sinks: opportunities, challenges, applications, analysis, and state of the art. Int J Heat Mass Transf 89:138–158. CrossRefGoogle Scholar
  6. 6.
    Kandlikar S, Garimella S, Li D, Colin S, King M (2014) Heat transfer and fluid flow in minichannels and microchannels. Google Scholar
  7. 7.
    Faghri A (2012) Review and advances in heat pipe science and technology. J Heat Transf 134(12):123001–123018. CrossRefGoogle Scholar
  8. 8.
    Thompson SM, Aspin ZS, Shamsaei N, Elwany A, Bian L (2015) Additive manufacturing of heat exchangers: a case study on a multi-layered Ti–6Al–4V oscillating heat pipe. Addit Manuf 8:163–174. CrossRefGoogle Scholar
  9. 9.
    Norfolk M, Johnson H (2015) Solid-state additive manufacturing for heat exchangers. JOM 67(3):655–659. CrossRefGoogle Scholar
  10. 10.
    Jafari D, Wits WW (2018) The utilization of selective laser melting technology on heat transfer devices for thermal energy conversion applications: a review. Renew Sust Energ Rev 91:420–442. CrossRefGoogle Scholar
  11. 11.
    Körner C (2016) Additive manufacturing of metallic components by selective electron beam melting - a review. Int Mater Rev 61(5):361–377. CrossRefGoogle Scholar
  12. 12.
    Murr LE, Gaytan SM, Ramirez DA, Martinez E, Hernandez J, Amato KN, Shindo PW, Medina FR, Wicker RB (2012) Metal fabrication by additive manufacturing using laser and electron beam melting technologies. J Mater Sci Technol 28(1):1–14. CrossRefGoogle Scholar
  13. 13.
    Eschey C, Lutzmann S, Zaeh M (2009) Examination of the powder spreading effect in electron beam melting (EBM). Solid Freeform Fabrication, Austin, pp 3–5Google Scholar
  14. 14.
    Wang X, Guo E, Gong S, Li B (2014) Realization and experimental analysis of electron beam Surfi-Sculpt on Ti-6Al-4V alloy. Rare Metal Mater Eng 43(4):819–822. CrossRefGoogle Scholar
  15. 15.
    Earl C, Hilton P, O’Neill B (2012) Parameter influence on Surfi-Sculpt processing efficiency. Phys Procedia 39:327–335. CrossRefGoogle Scholar
  16. 16.
    Sanderson A (2007) Four decades of electron beam development at TWI. Weld World 51(1–2):37–49CrossRefGoogle Scholar
  17. 17.
    Wang X, Ahn J, Bai Q, Lu W, Lin J (2015) Effect of forming parameters on electron beam Surfi-Sculpt protrusion for Ti–6Al–4V. Mater Des 76:202–206. CrossRefGoogle Scholar
  18. 18.
    Amara E, Fabbro R (2008) Modelling of gas jet effect on the melt pool movements during deep penetration laser welding. J Phys D Appl Phys 41(5):055503. CrossRefGoogle Scholar
  19. 19.
    Scharowsky T, Osmanlic F, Singer R, Körner C (2014) Melt pool dynamics during selective electron beam melting. Appl Phys A 114(4):1303–1307. CrossRefGoogle Scholar
  20. 20.
    Riedlbauer D, Scharowsky T, Singer RF, Steinmann P, Körner C, Mergheim J (2017) Macroscopic simulation and experimental measurement of melt pool characteristics in selective electron beam melting of Ti-6Al-4V. Int J Adv Manuf Technol 88(5):1309–1317. CrossRefGoogle Scholar
  21. 21.
    Fotovvati B, Wayne SF, Lewis G, Asadi E (2018) A review on melt-pool characteristics in laser welding of metals. Adv Mater Sci Eng 2018:1–18CrossRefGoogle Scholar
  22. 22.
    Juechter V, Scharowsky T, Singer R, Körner C (2014) Processing window and evaporation phenomena for Ti–6Al–4V produced by selective electron beam melting. Acta Mater 76:252–258. CrossRefGoogle Scholar
  23. 23.
    Luo F, Yao J-h, Hu X-x, Chai G-z (2011) Effect of laser power on the cladding temperature field and the heat affected zone. J Iron Steel Res Int 18(1):73–78. CrossRefGoogle Scholar
  24. 24.
    Scharowsky T, Bauereiß A, Körner C (2017) Influence of the hatching strategy on consolidation during selective electron beam melting of Ti-6Al-4V. Int J Adv Manuf Technol 92(5):2809–2818. CrossRefGoogle Scholar

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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