Development of a Stable-Beta Titanium Alloy
Quarterly rept. no. 10, 1 Oct-31 Dec 1964
TITANIUM METALS CORP OF AMERICA NEW YORK
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Evaluation of ageable beta alloys Ti-17V-2Fe-2Co-3Al, Ti-17V-7.5Co-3A1 and Ti-8Mo-8V-5Co-3Al continued with room and elevated temperature smooth and notched tensile tests, creep stability, oxidation and stress-corrosion tests. Ti-17V-7.5Co-3Al aged more rapidly than Ti-8Mo-8V-5Co-3Al after aging for 8 hours at 900F, Ti-17V-7.5Co-3Al was only 158,000 psi. In smooth and notched tensile tests at 600F, Ti-17V-7.5Co-3Al displayed more strength than Ti-8Mo-8V-5Co-3Al because of its faster aging response in a given time. However, in creep stability tests and oxidation tests, Ti-8Mo8V-5Co-3Al was the better alloy. Stress corrosion tests performed upon all five ageable beta alloys developed in this project showed that, in the annealed condition, Ti-8Mo-8V-2Fe-3Al was the most resistant to stress corrosion and Ti-17V-7.5Co-3Al and Ti-8Mo- 8V-5Co-3Al the most susceptible. Keywords Titanium alloys Vanadium Cobalt Aluminum Molybdenum Iron.
- Metallurgy and Metallography
- Properties of Metals and Alloys