Improving the Creep Strength, Fracture Toughness, and LCF of Titanium Alloys

by Deep-Cryogenic-Treatment

Deep-Cryogenic-Treatment (DCT) is an advanced Super-Cool technology that significantly changes the characteristics of many types of materials. Deep-Cryogenic-Treatment is used by some airframe manufactures as well as some major producers of sub-systems and large components. There appear to be numerous applications for deep cryogenic tempering in the aerospace industry. These include turbine blades, landing gear system components and gears, steels and superalloys. Although many metals similarly treated have shown quite significant property improvements, so far no successful application has been shown for deep cryogenic treatment of titanium alloys. This program seeks to demonstrate a novel method to enhance the creep strength and toughness of titanium alloys using a specially modified Deep-Cryogenic-Treatment (DCT). Titanium test specimens from selected alloys will include Timetal 834, Ti-6Al-4V, IMI 685, IMI 829 or Ti-6Al-2Sn-4Zr-6Mo, with other alloys as potential candidates for the latter part of this effort.

Landing gear systems and components, as well as jet engine turbine blades, are just a few of the many aerospace applications of DCT.