Patent ID: 6355117
Filing Date: 2002-03-12
Classification: C22C

Abstract:
A single crystal superalloy article which is resistant to hydrogen embrittlement, said article have a composition (by weight %) of9-12 Cr 3.6-5.5 Al 3.8-6.8 W 5-11.9 Ta 0-1.9 Mo 4.9-9 Co 1.0-4.1 Ti 0.02-0.17 C 0.003-0.32 B 0.007-0.15 Zr 0.02-0.16 Y 0-0.15 Hf Bal essentially Ni and wherein (W+Mo+Ta) is equal to or greater than about 10% said article having a single crystal structure and having been heat treated to dissolve and eliminate all &ggr;/&ggr;â€² eutectic islands without causing any incipient melting.