Patent ID: 6054096
Filing Date: 2000-04-25
Classification: C22C

Abstract:
A composition useful in the production of single crystal turbine articles consisting of:a. from about 5% to about 12% chromium;b. from about 2% to about 8% aluminum;c. up to about 6% titanium, with the sum of the aluminum and titanium contents being at least 4% and the ratio of aluminum to titanium being at least 1:1;d. up to about 9.5% tantalum;e. up to about 12% tungsten;f. up to about 3% molybdenum;g. up to about 3% columbium;h. up to about 3.5% hafnium;i. up to about 7% rhenium;j. with the sum of molybdenum, columbium, hafnium, rhenium, tantalum and tungsten exceeding 5%;k. said composition being free from intentional additions of carbon, boron, zirconium and vanadium;l. an intentional addition of cobalt sufficient to render the composition stable according to the criteria set out in FIGS. 1 or 2, wherein the addition of cobalt is from 1-10%; balance essentially nickel.