Publisher： John Wiley & Sons Inc
E-ISSN： 1527-2648|17|6|755-760
ISSN： 1438-1656
Source： ADVANCED ENGINEERING MATERIALS (ELECTRONIC), Vol.17, Iss.6, 2015-06, pp. : 755-760
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Abstract
An experimental Co‐base superalloy was designed from the Ni‐base system by exchange of Ni and Co concentrations. The alloy consist of a Co‐matrix (γ phase) strengthened by cuboidal precipitates Co3(Al,X) (γ′ phase). The γ′‐solvus temperature is 1 005 °C. [001] single crystals of this alloy were solidified and tested for tension at different temperatures up to 1 000 °C. It was found that the Co‐base alloy has a much lower yield stress than a corresponding Ni‐base alloy, but a much higher ductility. The partitioning behaviour of the alloying elements in the Co‐base alloy and the deformation mechanisms were investigated by scanning and transmission electron microscopy.
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