Activity Development of high temperature alloys

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):


We focuse on the development of new alloys for the requirements of industry as well as on clarifying scientific questions. Numerical tools based on CALPHAD (Calculation of Phase Diagrams) calculations as well as further property modeling approaches are used to predict thermomechanical properties of the materials and to optimize them in terms of the desired characteristics. For this purpose the software tool MultOpt was developed. In general, the potential of promising alloys are a compromise between various relevant properties, which are represented in the form of Pareto fronts. The user can decide which alloy is fitting best by weighting up the importance of the conflicting properties. The numerically determined alloy is then cast by an institute own Bridgman furnace. The numerical tool HeatOpt, a coupling of CALPHAD with the phase field method, is used to determine suitable heat treatment parameters, which are applied after alloy manufacturing. Furthermore, the alloys are characterized in terms of their microstructures and mechanical properties. The values determined experimentally are compared with the previously calculated values and an adaptation of the respective numerical modeling is carried out for data with a large discrepancy.


Publications
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Rettig, R., Ritter, N., Helmer, H.E., Neumeier, S., & Singer, R. (2015). Single-crystal nickel-based superalloys developed by numerical multi-criteria optimization techniques: Design based on thermodynamic calculations and experimental validation. Modelling and Simulation in Materials Science and Engineering, 23(3). https://dx.doi.org/10.1088/0965-0393/23/3/035004
Rettig, R., & Singer, R. (2014). Fast interpolation algorithm for the calculation of thermodynamic property maps of microstructures. Modelling and Simulation in Materials Science and Engineering, 22(8), 1-19. https://dx.doi.org/10.1088/0965-0393/22/8/085002
Matuszewski, K., Rettig, R., & Singer, R. (2014). The effect of Ru on precipitation of topologically close packed phases in Re-containing Ni base superalloys: Quantitative FIB-SEM investigation and 3D image modeling. Giens: EDP Sciences.
Matuszewski, K., Rettig, R., Rasiński, M., Kurzydlowski, K.J., & Singer, R. (2014). The Three-dimensional morphology of topologically close packed phases in a high rhenium containing nickel based superalloy. Advanced Engineering Materials, 16(2), 171-175. https://dx.doi.org/10.1002/adem.201300198
Franke, M. (2013). Auswirkungen der Legierungszusammensetzung auf die Morphologie und die Festigkeit des Dendritennetzwerkes bei der gerichteten Erstarrung von Nickelbasis-Superlegierungen (Dissertation).
Heckl, A., Cenanovic, S., Göken, M., & Singer, R. (2012). Discontinuous precipitation and phase stability in Re- and Ru-containing nickel-base superalloys. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 43(1), 10-19. https://dx.doi.org/10.1007/s11661-011-0833-6
Rettig, R., & Singer, R. (2012). Influence of Ruthenium on topologically closed packed phase precipitation in single-crystal Ni-based superalloys: numerical experiments and validation. In E. S. Huron, R. C. Reed, M. C. Hardy, M. J. Mills, R. E. Montero, P. Dolabella Portella, J. Telesman (Eds.), Superalloys 2012: Proceedings of the 12th Intenational Symposium of Superalloys (pp. 205-214). Seven Springs, US: Minerals, Metals and Materials Society.
Heckl, A. (2011). Auswirkungen von Rhenium und Ruthenium auf die Mikrostruktur und Hochtemperaturfestigkeit von Nickel-Basis Superlegierungen unter Berücksichtigung der Phasenstabilität (Dissertation).
Heckl, A., Rettig, R., & Singer, R. (2011). Creep rupture strength of Re and Ru containing experimental nickel-base superalloys. Advanced Optical Materials, 278, 339-344. https://dx.doi.org/10.4028/www.scientific.net/AMR.278.339
Rettig, R., Heckl, A., & Singer, R. (2011). Modeling of precipitation kinetics of TCP-phases in single crystal nickel-base superalloys. Advanced Materials Research, 278, 180-185. https://dx.doi.org/10.4028/www.scientific.net/AMR.278.180

Last updated on 2018-15-10 at 11:54