A Single‐Crystal Co‐Base Superalloy Strengthened by γ′ Precipitates: Structure and Mechanical Properties[a]. Issue 6 (20th April 2015)

• Record Type: Journal Article
• Authors: Petrushin, Nikolay; Hvatzkiy, Konstantin; Gerasimov, Victor; Link, Thomas; Epishin, Alexander; Nolze, Gert; Gerstein, Gregory
• Is Part Of: Advanced engineering materials. Volume 17:Issue 6(2015:Jun.)
• Page Start: 755
• Page End: 760
• Publication Date: 2015-04-20
• Subjects: Materials -- Periodicals; 620.11
• DOI: 10.1002/adem.201500088
• Languages: English
• ISSNs: 1438-1656

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="adem201500088-sec-0001" sec-type="section"> <p>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.</p> </sec> </abstract>