	Dipl.-Ing. Michael Kellner
	Mitarbeiter Room: 101 Phone: +49 721 608-41474 michael kellnerRks8∂kit edu	Institut für Angewandte Materialien Computational Materials Science (IAM-CMS) MZE - Geb. 30.48 Straße am Forum 7 76131 Karlsruhe

Research

Integration of thermodynamic energies from
CALPHAD databases in phase-field simulations

Preprocessing

Extraction of thermodynamic energies from CALPHAD databases
Construction of new computational economical Gibbs free energy formulations by fit
Implementation of new formalisms in phase-field simulations

title_slide_kellner

Directional solidification of superalloys

Phase-field simulations

Directional solidification of the nickel-based superalloys with intermatallic phase NiAl (BCC-B2 stucture)
Directional solidification of niob-silicides with stoichiometric phase
Investigated systems: NiAl-Cr, NiAl-Mo, Ni-Al-Cr, Ni-Al-Mo, Nb-Si and Nb-Si-Cr

Poster
Titel	Autor	Quelle
Integration of thermodynamic energies in phase-field simulations: Ternary solidification	M. Kellner, P. Steinmetz, I. Sprenger, F. Gang, A. Choudhury, B. Nestler	2015 Intermetallics, Bad Staffelstein September 28 - Oktober 2, 2015

Publikationsliste

Phase-field study of eutectic colony formation in NiAl-34Cr.
Kellner, M.; Hötzer, J.; Schoof, E.; Nestler, B.
2020. Acta materialia, 182, 267–277. doi:10.1016/j.actamat.2019.10.028

Theoretical and numerical investigations of rod growth of an Ni–Zr eutectic alloy.
Enugala, S. N.; Kellner, M.; Kobold, R.; Hötzer, J.; Kolbe, M.; Nestler, B.; Herlach, D.
2019. Journal of materials science, 54 (19), 12605–12622. doi:10.1007/s10853-019-03802-3

Investigation of the microstructure adjustment by velocity variations during the directional solidification of Al-Ag-Cu with the phase-field method.
Hötzer, J.; Kellner, M.; Kunz, W.; Nestler, B.
2019. Joint 5th International Conference on Advances in Solidification Processes (ICASP-5) & 5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining (CSSCR-5) 17–21 June 2019, Salzburg, Austria, Article No.012007, Institute of Physics Publishing. doi:10.1088/1757-899X/529/1/012007

Phase-field simulation of solid state sintering.
Hötzer, J.; Seiz, M.; Kellner, M.; Rheinheimer, W.; Nestler, B.
2019. Acta materialia, 164, 184–195. doi:10.1016/j.actamat.2018.10.021

Quantitative Comparison of Ternary Eutectic Phase-Field Simulations with Analytical 3D Jackson–Hunt Approaches.
Steinmetz, P.; Kellner, M.; Hötzer, J.; Nestler, B.
2018. Metallurgical and materials transactions / B, 49 (1), 213–224. doi:10.1007/s11663-017-1142-2

Phase-field modeling of reactive wetting and growth of the intermetallic Al2 Au phase in the Al-Au system.
Wang, F.; Reiter, A.; Kellner, M.; Brillo, J.; Selzer, M.; Nestler, B.
2018. Acta materialia, 146, 106–118. doi:10.1016/j.actamat.2017.12.015

Phase-field study of dynamic velocity variations during directional solidification of eutectic NiAl-34Cr.
Kellner, M.; Kunz, W.; Steinmetz, P.; Hötzer, J.; Nestler, B.
2018. Computational materials science, 145, 291–305. doi:10.1016/j.commatsci.2017.12.053

Perspectives on material modelling: Porous and particle-based microstructures.
Nestler, B.; August, A.; Selzer, M.; Hötzer, J.; Kellner, M.; Prajapati, N.; Rehn, V.; Seiz, M.
2018. Ceramic applications, 6 (1), 73–77

Study of pattern selection in 3D phase-field simulations during the directional solidification of ternary eutectic Al-Ag-Cu.
Steinmetz, P.; Hötzer, J.; Kellner, M.; Genau, A.; Nestler, B.
2018. Computational materials science, 148, 131–140. doi:10.1016/j.commatsci.2018.02.040

Phasenfeldsimulationen zur Mikrostrukturentwicklung während des Sinterprozesses.
Hölzer, J.; Kellner, M.; Rehn, V.; Seiz, M.; Nestler, B.
2017. Forschung aktuell, 8–12

Influence of growth velocity variations on the pattern formation during the directional solidification of ternary eutectic Al-Ag-Cu.
Hötzer, J.; Steinmetz, P.; Dennstedt, A.; Genau, A.; Kellner, M.; Sargin, I.; Nestler, B.
2017. Acta materialia, 136, 335–346. doi:10.1016/j.actamat.2017.07.007

Phase-field study on the effects of process and material parameters on the tilt angle during directional solidification of ternary eutectics.
Dargahi Noubary, K.; Kellner, M.; Steinmetz, P.; Hötzer, J.; Nestler, B.
2017. Computational materials science, 138, 403–411. doi:10.1016/j.commatsci.2017.07.006

Design for Energy Efficiency: Structural Optimization Process for Mechanical Parts in Dynamic Systems.
Sander, C.; Kellner, M.; Albers, A.
2013. NWC 2013, NAFEMS world congress SPDM, International Conference Simulation Process & Data Management, Salzburg, Austria, 9. - 12. June, 2013, Bernau am Chiemsee NAFEMS Deutschland, Österreich, Schweiz GmbH

Study of complex microstructure evolution in ternary eutectic alloys with massive parallel large-scale phasefield simulations.
Hötzer, J.; Jainta, M.; Bauer, M.; Steinmetz, P.; Kellner, M.; Köstler, H.; Rüde, U.; Nestler, B.
2016. High performance computing in science and engineering, Garching/Munich 2016. Ed.: S. Wagner, 194–195, Bayerische Akademie der Wissenschaften, München

Phase-field simulation of the microstructure evolution in the eutectic NiAl-34Cr system.
Kellner, M.; Sprenger, I.; Steinmetz, P.; Hötzer, J.; Nestler, B.; Heilmaier, M.
2017. Computational materials science, 128, 379–387. doi:10.1016/j.commatsci.2016.11.049

Large-scale phase-field simulations of ternary eutectic microstructure evolution.
Steinmetz, P.; Hötzer, J.; Kellner, M.; Dennstedt, A.; Nestler, B.
2016. Computational materials science, 117, 205–214. doi:10.1016/j.commatsci.2016.02.001

Phase-field simulations of spiral growth during directional ternary eutectic solidification.
Hötzer, J.; Steinmetz, P.; Jainta, M.; Schulz, S.; Kellner, M.; Nestler, B.; Genau, A.; Dennstedt, A.; Bauer, M.; Köstler, H.; Rüde, U.
2016. Acta materialia, 106, 249–259. doi:10.1016/j.actamat.2015.12.052

Applications of the phase-field method for the solidification of microstructures in multi-component systems.
Hötzer, J.; Kellner, M.; Steinmetz, P.; Nestler, B.
2016. Journal of the Indian Institute of Science, 96 (3), 235–256

A method for coupling the phase-field model based on a grand-potential formalism to thermodynamic databases.
Choudhury, A.; Kellner, M.; Nestler, B.
2015. Current opinion in solid state & materials science, 19 (5), 287–300. doi:10.1016/j.cossms.2015.03.003

Phase-field study of the pattern formation in Al-Ag-Cu under the influence of the melt concentration.
Steinmetz, P.; Kellner, M.; Hötzer, J.; Dennstedt, A.; Nestler, B.
2016. Computational Materials Science, 121, 6–13. doi:10.1016/j.commatsci.2016.04.025

Publikationen
Titel	Autor	Quelle
A method for coupling the phase-field model based on a grand-potential formalism to thermodynamic databases	A. Choudhury, M. Kellner, B. Nestler	Current Opinion in Solid State and Material Science, 19, 5, (2015). 287-300