Activity Development of process strategies

Internally funded project


Project Details

Project leader:
Prof. Dr.-Ing. Carolin Körner


Contributing FAU Organisations:
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

Start date: 01/01/2000


Research Fields

Additive Manufacturing
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


Abstract (technical / expert description):


The electron beam offers the potential for innovative selective beam melting process strategies due its inertia-free deflection at extremely high speed.



A deep understanding of the process is developed with the help of different methods of in-situ process monitoring (thermal imaging and high speed camera). In particular, the potential to tailor the microstructure, grain structure and texture of the material with the help of the extremely high beam velocity is explored. In addition, we investigate the mechanisms of evaporation induced material displacement and the possibility to use this effect to realize hollow structures within components.



CRC DFG 814 “Additive Manufacturing”  (http://www.sfb814.forschung.uni-erlangen.de/).



 



A further focus is on processing of single crystalline nickel-base alloys. We are designing building strategies to avoid cold and hot crack formation. The main challenge is to control directional and rapid solidification in order to realize single crystals directly developing from powder particles without any seed material. We are now able to realize large single crystals out of nickel-base alloys with unique homogeneity by selective electron beam melting. 



CRC DFG TR 103 “From Atom to Turbine Blade” (http://www.sfb-transregio103.de/).


Publications
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Pobel, C., Reichel, S., Fu, Z., Osmanlic, F., & Körner, C. (2019). Advanced process strategy to realize microducts free of powder using selective electron beam melting. International Journal of Advanced Manufacturing Technology. https://dx.doi.org/10.1007/s00170-019-03615-3
Meid, C., Dennstedt, A., Ramsperger, M., Pistor, J., Ruttert, B., Lopez-Galilea, I.,... Bartsch, M. (2019). Effect of heat treatment on the high temperature fatigue life of single crystalline nickel base superalloy additively manufactured by means of selective electron beam melting. Scripta Materialia, 168, 124-128. https://dx.doi.org/10.1016/j.scriptamat.2019.05.002
Pistor, J., & Körner, C. (2019). Formation of topologically closed packed phases within CMSX-4 single crystals produced by additive manufacturing. Materials Letters, 1. https://dx.doi.org/10.1016/j.mlblux.2019.100003
Körner, C., Ramsperger, M., Meid, C., Bürger, D., Wollgramm, P., Bartsch, M., & Eggeler, G. (2018). Microstructure and Mechanical Properties of CMSX-4 Single Crystals Prepared by Additive Manufacturing. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 49(9), 3781-3792. https://dx.doi.org/10.1007/s11661-018-4762-5
Ramsperger, M. (2018). Selektives Elektronenstrahlschmelzen der einkristallinen Ni-Basis Superlegierung CMSX-4 (Dissertation).
Hübner, D., Gotterbarm, M., Kergaßner, A., Köpf, J., Pobel, C., Markl, M.,... Stingl, M. (2018). Topology Optimization in Additive Manufacturing Considering the Grain Structure of Inconel 718 using Numerical Homogenization. In Proceedings of 7th International Conference on Additive Technologies (pp. 102-111). Maribor, SI.
Scharowsky, T., Bauereiß, A., & Körner, C. (2017). Influence of the hatching strategy on consolidation during selective electron beam melting of Ti-6Al-4V. International Journal of Advanced Manufacturing Technology, 1-10. https://dx.doi.org/10.1007/s00170-017-0375-1
Riedlbauer, D.-R., Scharowsky, T., Singer, R., 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. International Journal of Advanced Manufacturing Technology. https://dx.doi.org/10.1007/s00170-016-8819-6
Rai, A., Helmer, H., & Körner, C. (2017). Simulation of grain structure evolution during powder bed based additive manufacturing. Additive Manufacturing, 13, 124-134. https://dx.doi.org/10.1016/j.addma.2016.10.007
Helmer, H.E. (2016). Additive Fertigung durch Selektives Elektronenstrahlschmelzen der Nickelbasis Superlegierung IN718: Prozessfenster, Mikrostruktur und mechanische Eigenschaften (Dissertation).

Last updated on 2019-07-05 at 14:54