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Tuesday, May 16, 2006 - 4:30 PM
TALLT062.6

High Strength Ti-15Mo Beta Titanium Alloy

V. R. Jablokov, H. Freese, ATI Allvac, Monroe, NC; L. D. Zardiackas, M. Roach, S. Williamson, University of Mississippi Medical Center, Jackson, MS

Low strength solution treated Ti-15Mo beta titanium has been used for several years in the biomedical market primarily due to its excellent biocompatibility with the human body. However, due to the alloys relative low strength in the solution annealed condition, it has found limited use mostly in fracture fixation type applications where fatigue resistance is not an issue.

Much work was invested the past several years by ATI Allvac to develop a higher strength version of Ti-15Mo to expand its use in the biomedical market and to make it suitable in other markets such as aerospace. The main goal of the development program undertaken by ATI Allvac was to create an alloy suitable for use in high load, fatigue critical applications. Using patent pending processing techniques, a uniform, very fine-grained material was successfully developed which has resulted in a material with excellent smooth and notch fatigue resistance. The thermo-mechanical processing methods used to develop the high strength alloy as well as the resulting microstructure, fatigue, SCC, and tensile properties will be presented.


Summary: Low strength solution treated Ti-15Mo beta titanium has been used for several years in the biomedical market primarily due to its excellent biocompatibility with the human body. However, due to the alloys relative low strength in the solution annealed condition, it has found limited use mostly in fracture fixation type applications where fatigue resistance is not an issue. Much work was invested the past several years by ATI Allvac to develop a higher strength version of Ti-15Mo to expand its use in the biomedical market and to make it suitable in other markets such as aerospace. The main goal of the development program undertaken by ATI Allvac was to create an alloy suitable for use in high load, fatigue critical applications. Using patent pending processing techniques, a uniform, very fine-grained material was successfully developed which has resulted in a material with excellent smooth and notch fatigue resistance. The thermo-mechanical processing methods used to develop the high strength alloy as well as the resulting microstructure, fatigue, SCC, and tensile properties will be presented.