The effect of Re and Ru on γ/γ′ microstructure, γ-solid solution strengthening and creep strength in nickel-base superalloys

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Heckl A, Neumeier S, Göken M, Singer R
Zeitschrift: Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
Verlag: Elsevier
Jahr der Veröffentlichung: 2011
Band: 528
Heftnummer: 9
Seitenbereich: 3435-3444
ISSN: 0921-5093


Abstract


A new in-house designed series of Ni based superalloys with stepwise increased Re and Ru additions has been investigated, to systematically determine the influence of Re and Ru on γ/γ′-microstructure and high temperature creep properties. Improved creep resistance and thus also a higher alloy temperature capability of up to 87. K/at.% was found for additions of Re. Additions of Ru revealed a lower temperature capability improvement of up to 38. K/at.% for low Re-containing second generation alloys. However, in third and fourth generation alloys with higher Re-contents, no significant influence of Ru on creep rupture strength was observed. The creep properties are discussed with respect to the γ′-volume fraction, γ′-size and γ′-coarsening rate, as well as the γ/γ′-lattice misfit and the γ/γ′ partitioning coefficient of the different Re and Ru containing alloys. The presented data shows, that these microstructure parameters are strongly influenced by additions of Re, but only marginally by additions of Ru. A further influence on creep rupture strength is given by the solid solution hardening of the γ-matrix, which is discussed based on solid solution hardener concentrations either experimentally derived or calculated from ThermoCalc data. © 2011 Elsevier B.V.



FAU-Autoren / FAU-Herausgeber

Göken, Mathias Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Heckl, Astrid
Graduiertenzentrum der FAU
Neumeier, Steffen Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Singer, Robert Prof. Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


Zitierweisen

APA:
Heckl, A., Neumeier, S., Göken, M., & Singer, R. (2011). The effect of Re and Ru on γ/γ′ microstructure, γ-solid solution strengthening and creep strength in nickel-base superalloys. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 528(9), 3435-3444. https://dx.doi.org/10.1016/j.msea.2011.01.023

MLA:
Heckl, Astrid, et al. "The effect of Re and Ru on γ/γ′ microstructure, γ-solid solution strengthening and creep strength in nickel-base superalloys." Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 528.9 (2011): 3435-3444.

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