Microstructure and compression strength of Co-based superalloys hardened by γ′ and carbide precipitation

Journal article


Publication Details

Author(s): Carton-Cordero M, Campos M, Freund L, Kolb M, Neumeier S, Göken M, Torralba JM
Journal: Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
Publisher: ELSEVIER SCIENCE SA
Publication year: 2018
Volume: 734
Pages range: 437-444
ISSN: 0921-5093


Abstract

A Co-based superalloy, Co-9Al-9W (at%), was processed by mechanical alloying by high-energy milling of elemental powders and consolidated by field assisted hot pressing (FAHP). The milled powder particles mainly consist of undissolved bcc-W as well as WC and an Al and W rich fcc-gamma Co solid solution. After consolidation and heat treatment a fine grained microstructure with a high fraction of carbides and a gamma/gamma' microstructure was obtained. The compressive yield strength at room temperature was found to be 45% higher than that of previously reported results for Co-based superalloys. A similar level of strength was found at 700 degrees C. These extraordinary properties can be explained due to the multitude of hardening mechanisms that sintered Co-based superalloys possess: gamma' precipitation, carbide formation and the ultra-fine se-grain size promoted by the fast consolidation technique.


FAU Authors / FAU Editors

Freund, Lisa
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Göken, Mathias Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Kolb, Markus
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Neumeier, Steffen Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)


External institutions with authors

Institute IMDEA Materials
Universidad Carlos III de Madrid (UC3M)


How to cite

APA:
Carton-Cordero, M., Campos, M., Freund, L., Kolb, M., Neumeier, S., Göken, M., & Torralba, J.M. (2018). Microstructure and compression strength of Co-based superalloys hardened by γ′ and carbide precipitation. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 734, 437-444. https://dx.doi.org/10.1016/j.msea.2018.08.007

MLA:
Carton-Cordero, Marta, et al. "Microstructure and compression strength of Co-based superalloys hardened by γ′ and carbide precipitation." Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 734 (2018): 437-444.

BibTeX: 

Last updated on 2019-06-01 at 12:10