Method for producing very fine microstructures in titanium aluminide alloy powder compacts

摘要

A method of producing titanium alloy articles having a desired microstructure which comprises the steps of:PP(a) providing a prealloyed titanium alloy powder;PP(b) filling a suitable die or mold with the powder;PP(c) hot isostatic press (HIP) consolidating the powder in the filled mold at a pressure of 30 Ksi or greater and at a temperature of about 60 to 80 percent of the beta transus temperature of the alloy, in degrees C. PPIn another embodiment of the invention, the prealloyed titanium aluminide alloy powder is hydrogenated to about 0.1 to 1.0 wt. % prior to die filling and consolidation. The compacted article is vacuum annealed to remove hydrogen from the article after removal of the die material.