Harald Helmer



Organisation


Technische Fakultät
Zentralinstitut für Neue Materialien und Prozesstechnik
Sonderforschungsbereich/Transregio 103 Vom Atom zur Turbinenschaufel - wissenschaftliche Grundlagen für eine neue Generation einkristalliner Superlegierungen


Publications (Download BibTeX)


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. (2016). Additive Fertigung durch Selektives Elektronenstrahlschmelzen der Nickelbasis Superlegierung IN718: Prozessfenster, Mikrostruktur und mechanische Eigenschaften (Dissertation).
Rettig, R., Matuszewski, K., Müller, A., Helmer, H., Ritter, N., & Singer, R. (2016). Development of a low-density rhenium-free single crystal nickel-based superalloy by application of numerical multi-criteria optimization using thermodynamic calculations. In M. Hardy, E. Huron, U. Glatzel, B. Griffin, B. Lewis, C. Rae, V. Seetharaman, S. Tin (Eds.), Superalloys 2016: Proceedings of the 13th Intenational Symposium of Superalloys (pp. 35-44). Seven Springs, US: Minerals, Metals and Materials Society.
Helmer, H., Bauereiß, A., Singer, R., & Körner, C. (2016). Erratum to: ‘Grain structure evolution in Inconel 718 during selective electron beam melting’ (Materials Science & Engineering A (2016) 668 (180–187 (S0921509316305536) (10.1016/j.msea.2016.05.046)). Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 676. https://dx.doi.org/10.1016/j.msea.2016.09.016
Helmer, H., Bauereiß, A., Singer, R., & Körner, C. (2016). Grain structure evolution in Inconel 718 during selective electron beam melting. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 668, 180-187. https://dx.doi.org/10.1016/j.msea.2016.05.046
Pröbstle, M., Neumeier, S., Feldner, P., Rettig, R., Helmer, H., Singer, R., & Göken, M. (2016). Improved creep strength of nickel-base superalloys by optimized γ/γ′ partitioning behavior of solid solution strengthening elements. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 676, 411-420. https://dx.doi.org/10.1016/j.msea.2016.08.121
Rettig, R., Ritter, N., Helmer, H., 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
Helmer, H., Körner, C., & Singer, R. (2014). Additive manufacturing of nickel-based superalloy Inconel 718 by selective electron beam melting: Processing window and microstructure. Journal of Materials Research, 29(17), 1987-1996. https://dx.doi.org/10.1557/jmr.2014.192
Körner, C., Helmer, H., Bauereiß, A., & Singer, R. (2014). Tailoring the grain structure of IN718 during selective electron beam melting. In Proceedings of the 2nd European Symposium on Superalloys and Their Applications, EUROSUPERALLOYS 2014. Giens: EDP Sciences.
Biber, S., Günther, O., Bozzi, M., Perregrini, L., Fischer, B., Hofmann, A.,... Schmidt, L.-P. (2005). A Frequency Selective Surface for Harmonic Suppression in THz-Multipliers. In German Microwave Conference, Ulm, Germany, April.

Last updated on 2019-16-03 at 22:57