Monocrystalline alloy with a nickel matrix basis

US4639280A · kind A · utility

Assignees

• Association Pour La Recherche Developpement Des Methodes Et Processus Industriels · FR
• IMPHY S.A. · FR
• OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AÉROSPATIALES · FR
• Societe Nationale d'Etude et de Construction de Moteurs d'Aviation - S.N.E.C.M.A · FR

Inventors

• Allan Mark Fredholm · Vulaines-sur-Seine, FR
• James H. Davidson · Terre Haute, US
• Tasadduq Khan · Vélizy-Villacoublay, FR
• Jean-Mare C. F. Theret · Versailles, FR

Key dates

• Filing date: Dec 10, 1984
• Grant date: Jan 27, 1987
• Expiry date: Dec 10, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C30B33/00
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A monocrystalline alloy with a high resistance to creep having a nickel base matrix, with a density of the order of 8.5 and having a percentage, by weight, composition as follows: Co 5 to 8%--Cr 6.5 to 10%--Mo 0.5 to 2.5%--W 5 to 9%--Ta 6 to 9%--Al 4.5 to 5.8%--Ti 1 to 2%--Nb 0 to 1.5%--C, Zr, and B each less than 100 ppm--Ni remainder to 100%. Furthermore, the summation Ta+Mo+1/2 W lies between 11.5% and 13.5% by weight, the atomic sum Ti+Al+Ta+Nb lies between 15.5% and 17%, the atomic sum Ta+Nb+Mo+1/2 W lies between 4% and 5.5%, the atomic sum Ti+Al+Ta+Nb+Mo+1/2 W lies between 17.5% and 19% and the atomic sum Ti+Al lies between 12.8% and 14.5%.