Property-balanced nickel-base superalloys for producing...

C - Chemistry – Metallurgy – 22 – C

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75/107, 148/55.1

C22C 19/05 (2006.01) C22F 1/10 (2006.01) C30B 11/00 (2006.01)

Patent

CA 1327132

IMPROVED AND PROPERTY-BALANCED NICKEL-BASE SUPERALLOYS FOR PRODUCING SINGLE CRYSTAL ARTICLES ABSTRACT The present invention is directed to the achievement of increased gas turbine engine efficiencies through futher improvements in nickel-base superalloys used to make parts and components for gas turbine engines. The present invention comprises nickel-base superalloys for producing single crystal articles having a significant increase in temperature capability, based on stress rupture strength and low and high cycle fatigue proprieties over single crystal articles made from current production nickel-base superalloys. Further, because of their superior resistance to degradation by cyclic oxidation, and their resistance to hot corrosion, the superalloys of this invention possess a balance in mechanical and environmental properties which is unique and has not heretofore been obtained.

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