Engineers from Allegheny Technologies, Monroe, N.C., discussed the development of new elevated-temperature titanium alloys in “ATI Development of High Temperature Titanium Alloys for Aerospace Applications,” a presentation at the Aeromat Conference May 8-9 in Orlando.
The attractive combination of good mechanical behavior and relatively low density has resulted in titanium alloys comprising 15 to 25% (by weight) of modern jet engine components in the fan, compressor, and nozzle sections. Typically, titanium jet engine alloys are selected from the group of near alpha and alpha-beta titanium alloys exhibiting good elevated temperature strength, creep resistance, and fatigue life. Improving the mechanical behavior of these alloys is a critical component of advancing engine performance.
ATI has discovered several new alpha-beta titanium alloy compositions which exhibit significantly improved elevated temperature strength and creep resistance. This presentation focused on the effects of chemistry and heat-treat conditions on the microstructure and resulting elevated temperature properties of these new aerospace titanium alloys.
John V. Mantione, Dr. Matias Garcia-Avila, Allegheny Technologies Inc., Monroe, N.C.
