Method to produce gamma titanium aluminide articles having improved properties

摘要

A first method for producing articles of gamma titanium alumide alloy having improved properties comprises the steps of: (a) shaping the article at a temperature between the titanium-aluminum eutectoid temperature of the alloy and the alpha-transus temperature of the alloy, and (b) aging the thus-shaped article at a temperature between about 750 DEG and 1050 DEG C. for about 4 to 150 hours. Shaping is preferably carried out at a temperature about 0 DEG to 50 DEG C. below the alpha-transus temperature. A second method for producing articles of gamma titanium aluminide alloy having improved properties comprises the steps of: (a) shaping the article at a temperature in the approximate range of about 130 DEG C. below the titanium-aluminum eutectoid temperature of the alloy to about 20 DEG C. below the alpha-transus temperature of the alloy; (b) heat treating the thus-shaped article at about the alpha-transus temperature of the alloy for about 15 to 120 minutes; and (c) aging the thus-heat treated article at a temperature between about 750 DEG and 1050 DEG C. for about 4 to 300 hours.