Bauer A, Neumeier S, Pyczak F, Singer R, Göken M (2012)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2012
Publisher: Elsevier
Book Volume: 550
Pages Range: 333-341
DOI: 10.1016/j.msea.2012.04.083
The influence of various alloying elements on the creep properties of polycrystalline Co-base superalloys hardened by a ternary L1 compound, Co (Al,W) (γ'-phase), was investigated. A Ti containing quaternary alloy shows creep strength similar to Ni-base superalloys IN100 and IN713C at 850°C and strongly superior to conventional Co-base superalloys as Haynes188. The activation energy for creep between 850 and 950°C is similar to the polycrystalline Ni-base superalloy IN100 in the same temperature range. Strengthening of the grain boundaries by third phase precipitates was found to be crucial for the mechanical properties. This can be achieved either by precipitation of borides or by additional intermetallic phases which precipitate due to oversaturation. During compressive creep at 850°C only a slight tendency for directional coarsening occurs, while at 950°C distinct γ/γ'-rafts perpendicular to the external compressive stress axis are formed which indicate a positive lattice misfit even at 950°C. © 2012 Elsevier B.V.
APA:
Bauer, A., Neumeier, S., Pyczak, F., Singer, R., & Göken, M. (2012). Creep properties of different γ'-strengthened Co-base superalloys. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 550, 333-341. https://doi.org/10.1016/j.msea.2012.04.083
MLA:
Bauer, Alexander, et al. "Creep properties of different γ'-strengthened Co-base superalloys." Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 550 (2012): 333-341.
BibTeX: Download