Microstructure and creep strength of different Gamma/Gamma′-strengthened Co-base superalloy variants

Bauer, A.; Neumeier, S.; Pyczak, F.; Goeken, M.

Journalpaper

Microstructure and creep strength of different Gamma/Gamma′-strengthened Co-base superalloy variants

Abstract

The influence of W, Ta, Ti, Nb, V, Si, Mo, Ir and Cr on the high temperature properties of γ/γ′-strengthened Co–Al–W superalloys was investigated. All alloys exhibited a γ/γ′ microstructure with remarkably differing γ′ volume fractions. W, Ta, Ti, Nb and V increased the γ′ volume fraction and γ′ solvus temperature. An increased W content and alloying of additional elements, except Ir, decreased the liquidus temperature. First creep experiments revealed a creep strength comparable with polycrystalline Ni-base superalloys and the importance of grain boundary strengthening.

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DOI Link to Publication

URL: https://publications.hereon.de/id/28226/
Authors:Bauer, A., Neumeier, S., Pyczak, F., Goeken, M.
Year:2010
In: Scripta Materialia
Volume:63
Issue:12
Pages:1197 - 1200
Publisher:Elsevier
Type:Journalpaper
ISSN: 1359-6462
Cite as: Bauer, A.; Neumeier, S.; Pyczak, F.; Goeken, M.: Microstructure and creep strength of different Gamma/Gamma′-strengthened Co-base superalloy variants. In: Scripta Materialia. Vol. 63 (2010) 12, 1197 - 1200. (DOI: 10.1016/j.scriptamat.2010.08.036)