Patent ID: 6436208
Filing Date: 2002-08-20
Classification: C22C,C30B

Abstract:
A process of preparing aligned, in-situ, two-phase single crystal alloys of titanium, aluminum, and niobium which comprises growing the two-phase single crystal alloys at a rate of about 3.0 mm. to about 6.0 mm. per hour by rotating a seed rod alloy consisting essentially of Ti-43 to 45 Al-10 to 12 Nb+0.5 Si, in atomic percent, at about 7.75 to 8.25 RPM while in contact with a rotating feed rod alloy consisting essentially of Ti-43-45Al-10 to 12 Nb, in atomic percent, rotating at about 5.75 to 6.25 RPM in an atmosphere of substantially pure inert gas at melt temperatures ranging from about 1650Â° C. to 1750Â° C. to obtain two-phase single crystal alloys of Ti-43 to 45 Al-10 to 12 Nb, in atomic percent, characterized as having good ductility, oxidation resistance and high-temperature creep strength.