Patent ID: 6231699
Filing Date: 2001-05-15
Classification: C22C,C22F

Abstract:
A method of producing a gamma titanium aluminide alloy article, comprising the steps of:providing a piece of a gamma titanium aluminide alloy having a composition capable of forming alpha, alpha-2, and gamma phases;determining the alpha transus temperature of the gamma titanium aluminide alloy piece;consolidating the gamma titanium aluminide alloy piece at elevated temperature to reduce porosity therein; wherein the step of consolidating the titanium aluminide piece includes the step of hot isostatic pressing the gamma titanium aluminide alloy piece, andheat treating the piece at a temperature of from about 5 F. to about 300 F. below the alpha transus temperature for a time sufficient to generate a refined microstructure comprising from about 10 to about 90 volume percent gamma phase.