A novel type of Co-Ti-Cr-base gamma/gamma ' superalloys with low mass density

Journal article

Publication Details

Author(s): Zenk C, Povstugar I, Li R, Rinaldi F, Neumeier S, Raabe D, Göken M
Journal: Acta Materialia
Publication year: 2017
Volume: 135
Pages range: 244-251
ISSN: 1359-6454


A gamma' strengthened Co-Ti-Cr superalloy is presented with a mass density similar to 14 % below that of typical Co-Al-W-based alloys. The lattice misfit is sufficiently low to form coherent cuboidal gamma' precipitates. Atom probe tomography shows that Cr partitions to the gamma phase, but increases the gamma' volume fraction compared to a binary Co-Ti alloy to more than 60 %. The solubility of Cr in the gamma' phase is significantly higher than expected from previously published values. The gamma' solvus temperature is above 1100 degrees C. The yield strength shows a distinct increase above 600 degrees C surpassing that of Co-9Al-8W (at.%) and conventional Co-base superalloys, even more so when it is normalized by the mass density. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

FAU Authors / FAU Editors

Göken, Mathias Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Neumeier, Steffen Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Zenk, Christopher
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

External institutions with authors

Bruker AXS GmbH
Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research

How to cite

Zenk, C., Povstugar, I., Li, R., Rinaldi, F., Neumeier, S., Raabe, D., & Göken, M. (2017). A novel type of Co-Ti-Cr-base gamma/gamma ' superalloys with low mass density. Acta Materialia, 135, 244-251. https://dx.doi.org/10.1016/j.actamat.2017.06.024

Zenk, Christopher, et al. "A novel type of Co-Ti-Cr-base gamma/gamma ' superalloys with low mass density." Acta Materialia 135 (2017): 244-251.


Last updated on 2018-28-11 at 01:08