Effect of Rii on the concentration distribution of elements and creep properties of nickel-based superalloy

摘要

The effects of Ru on creep properties,microstructure and elemental concentration distribution of nickel-based single crystal superalloy containing without Ru and 2% Ru are studied by means of creep tests under high temperature,morphology observation after heat treatment and determination of elemental concentration distribution by atomic probe.The results show that Ru can inhibit the precipitation of TCP phase and improve the solid solubility of W element in the alloy and the creep life of the alloy at high temperature.At the same time,the addition of element Ru can make the alloy to produce”reverse distribution”effect,improve the alloying degree of γ’phase and the effect of solution strength,which final significantly improve the high temperature creep rupture properties of the alloy containing Ru.