RT Journal Article
T1 Microstructure and compression strength of Co-based superalloys hardened by γ' and carbide precipitation
T2 Microstructure and compression strength of Co-based superalloys hardened by [gamma prima] and carbide precipitation
T2 Formation of a [gamma/gamma prima] microstructure in Co-based superalloys produced by a powder metallurgy route
A1 Cartón Cordero, Marta
A1 Campos Gómez, Mónica
A1 Freund, Lisa P.
A1 Kolb, Markus
A1 Neumeier, Steffen
A1 Göken, Mathias
A1 Torralba Castelló, José Manuel
AB 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-γ Co solid solution. After consolidation and heat treatment a fine grained microstructure with a high fraction of carbides and a γ/γ′ 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 °C. These extraordinary properties can be explained due to the multitude of hardening mechanisms that sintered Co-based superalloys possess: γ′ precipitation, carbide formation and the ultra-fine γ-grain size promoted by the fast consolidation technique.
PB Elsevier
SN 0921-5093
YR 2018
FD 2018-09-12
LK https://hdl.handle.net/10016/34619
UL https://hdl.handle.net/10016/34619
LA eng
NO Título de la versión aceptada del artículo: Formation of a γ/γ' microstructure in Co-based superalloys produced by a powder metallurgy route
NO This work has been developed within the international grant DAAD given by the German Academic Exchange Service. PilotManu (European Union, 7th Framework Programme NMP3-SE-2013-604344) funded by EU has supported as well the development. The authors acknowledge also funding by the Deutsche Forschungsgemeinschaft (DFG) of the Collaborative Research Center SFB/TR 103: “From Atoms to Turbine Blades – A Scientific Approach for Developing the Next Generation of Single Crystal Superalloys”.
DS e-Archivo
RD 27 jul. 2024