Societe Nationale D'etude Et De Construction De Moteurs D'aviation

Association Pour La Recherche Et Le Developpement Des Methodes Et

Office National D'etudes Et De Recherche Aerospatiales (onera)

Societe Imphy S.a.

Tasadduq Khan

James Henry Davidson

Allan Fredholm

Jean-Mare C Theret

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%.

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Jouy en Josas, France

Tasadduq Khan