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

Carton-Cordero M, Campos M, Freund L, Kolb M, Neumeier S, Göken M, Torralba JM (2018)

Publication Status: Published

Publication Type: Journal article

Publication year: 2018

Journal

Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing Elsevier

Publisher: ELSEVIER SCIENCE SA

Book Volume: 734

Pages Range: 437-444

DOI: 10.1016/j.msea.2018.08.007

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.

Authors with CRIS profile

Lisa Freund Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Markus Kolb Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Steffen Neumeier Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Mathias Göken Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

B03 (FP2): Einkristalline y'-gehärtete Co-Basis-Superlegierungen - Legierungsentwicklung, Gitterfehlpassung und mechanische Eigenschaften (SFB/TRR 103) SFB/TRR 103 Jan. 1, 2016 - Dec. 31, 2019

Involved external institutions

Universidad Carlos III de Madrid (UC3M) ES Spain (ES) Institute IMDEA Materials ES Spain (ES)

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.

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