DEVELOPMENT OF A STABLE-BETA TITANIUM ALLOY.
Quarterly rept. no. 13, 1 Jul-30 Sep 65,
TITANIUM METALS CORP OF AMERICA NEW YORK
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Time and temperature parameters for the 50 and 100 recrystallization of Ti-8Mo-8V-2Fe-3Al sheet were determined for the mill annealed condition and after two degrees of cold reduction. Aging response of the mill annealed sheet and of hot rolled sheet given a 25 cold reduction was determined employing aging temperatures of 800 - 1200F, and times of 2 - 24 hours. From this study, 37 combinations of solution treatment and aging were selected for room temperature tensile testing. Out of these tests, one fully aged condition, and one stabilized condition, for both mill annealed and cold rolled material, were selected for further evaluation. These four conditions were then evaluated by -65 and 600F smooth tensile tests and by room temperature, -65 and 600F notched tensile tests. In addition, a comparison of the oxidation resistance of Ti-8Mo-8V -2Fe-3Al and the commercial alloy Ti-13V-11Cr-3Al showed that the latter alloy was more resistant to oxidation. The evaluation of the stabilized ageable beta alloys was concluded with 150 and 500 hour creep stability tests only Ti-8Mo-8V-2Fe-3Al retained useful amounts of ductility after both exposure times. Author
- Metallurgy and Metallography
- Fabrication Metallurgy