Activity Single crystalline solidification with enhanced microstructure

Internally funded project


Project Details

Project leader:
Prof. Dr.-Ing. Robert Singer


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

Start date: 01/01/1990


Research Fields

High Temperature Materials
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


Abstract (technical / expert description):


Based on experience with the LMC (Liquid Metal Cooling) process, it is focused on the investigation of the newly developed FCBC (Fluidized Carbon Bed Cooling) process for the single crystalline solidification of superalloys. In comparison with commercially available investment casting processes it could be shown that FCBC benefits from a higher cooling potential. In combination with a dynamic baffle a higher axial temperature gradient will evolve. Objective is the improvement of the process understanding as well as the process optimization, carried out on a 10 kg prototype plant. A further point of interest is the exploitation of the increased microstructural homogeneity for alloy development.



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


Publications
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Hofmeister, M., Franke, M., Körner, C., & Singer, R. (2017). Single Crystal Casting with Fluidized Carbon Bed Cooling: A Process Innovation for Quality Improvement and Cost Reduction. Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science, 48(6), 3132-3142. https://dx.doi.org/10.1007/s11663-017-1110-x
Hofmeister, M., Klein, L., Miran, H., Rettig, R., Virtanen, S., & Singer, R. (2015). Corrosion behaviour of stainless steels and a single crystal superalloy in a ternary LiCl-KCl-CsCl molten salt. Corrosion Science, 90, 46-53. https://dx.doi.org/10.1016/j.corsci.2014.09.009
Franke, M., Hilbinger, R.M., Lohmüller, A., & Singer, R. (2013). The effect of liquid metal cooling on thermal gradients in directional solidification of superalloys: Thermal analysis. Journal of Materials Processing Technology, 213(12), 2081-2088. https://dx.doi.org/10.1016/j.jmatprotec.2013.06.001
Franke, M., Hilbinger, R.M., Heckl, A., & Singer, R. (2011). Effect of thermophysical properties and processing conditions on primary dendrite arm spacing of nickel-base superalloys - Numerical approach. Gießereiforschung, 278, 156-161. https://dx.doi.org/10.4028/www.scientific.net/AMR.278.156
Franke, M., Hilbinger, R.M., Konrad, C., Glatzel, U., & Singer, R. (2011). Numerical determination of secondary dendrite arm spacing for IN738LC investment castings. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 42(7), 1847-1853. https://dx.doi.org/10.1007/s11661-010-0585-8
Lamm, M. (2007). Einfluss der Erstarrungsbedingungen auf die mechanischen Eigenschaften von einkristallinen Superlegierungewn bei großen Wandstärken (Dissertation).
Singer, R., & Lamm, M. (2007). The effect of casting conditions on the high-cycle fatigue properties of the single-crystal nickel-base superalloy PWA 1483. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 38A(6), 1177-1183. https://dx.doi.org/10.1007/s11661-007-9188-4
Hördler, M. (2006). Phasengrenzreaktion im Fest-Flüssig-System Nickel/Zinn (Dissertation).
Lohmüller, A. (2002). Gerichtete Erstarrung mittels Flüssigmetallkühlung - Verfahrensoptimierung und Parametereinflüsse (Dissertation).
Pfennig, A. (2001). Mikrostruktur und Eigenschaften keramischer Formmassen im Feinguss (Dissertation).

Last updated on 2018-15-10 at 11:53