Double minimum creep in the rafting regime of a single-crystal Co-base superalloy

Journal article


Publication Details

Author(s): Xue F, Zenk C, Freund L, Hoelzel M, Neumeier S, Göken M
Journal: Scripta Materialia
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication year: 2018
Volume: 142
Pages range: 129-132
ISSN: 1359-6462


Abstract

To investigate whether the formation of rafts in Co-base superalloys has a hardening or softening effect, the single crystal deformation behavior was studied in the high temperature/low stress creep regime. The large positive lattice misfit of the investigated Co-base superalloy led to a pronounced directional coarsening of the microstructure normal to the stress axis during compressive creep at 950 degrees C/150 MPa. Two creep minima were observed similar to Ni-base superalloys under tensile creep. Rafting was accompanied by a decreasing creep rate indicating a hardening effect, although cutting of gamma' rafts by partial dislocations under the formation of stacking faults occurred. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.


FAU Authors / FAU Editors

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


External institutions with authors

Technische Universität München (TUM)


How to cite

APA:
Xue, F., Zenk, C., Freund, L., Hoelzel, M., Neumeier, S., & Göken, M. (2018). Double minimum creep in the rafting regime of a single-crystal Co-base superalloy. Scripta Materialia, 142, 129-132. https://dx.doi.org/10.1016/j.scriptamat.2017.08.039

MLA:
Xue, Fei, et al. "Double minimum creep in the rafting regime of a single-crystal Co-base superalloy." Scripta Materialia 142 (2018): 129-132.

BibTeX: 

Last updated on 2019-11-02 at 18:08