DIRECTIONALLY SOLIDIFIED CASTING WITH IMPROVED TRANSVERSE STRESS RUPTURE STRENGTH

摘要

Directionally solidified columnar grain nickel base alloy casting consisting essentially of, in weight %, of about 11.6 % to 12.70 % Cr, about 8.50 to 9,5 % Co, about 1.65 % to 2.15 % Mo, about 3.5 % to 4.10 % W, about 4.80 % to 5.20 % Ta, about 3.40 to 3.80 % Al, about 3.9 % to 4.25 % Ti, about 0.05 % to 0.11 % C, about 0.003 % to 0.015 % B, balance essentially Ni and having substantial transverse stress rupture strength and ductility as compared to a similar casting without boron present.