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Accession Number:
AD0872871
Title:
Development of a 900F Titanium Alloy.
Corporate Author:
REACTIVE METALS INC NILES OH
Report Date:
1970-07-01
Abstract:
Titanium base alloys containing up to 1Si were evaluated for long term creep applications at 900F. Silicon additions were found to improve creep strength with the most desirable properties obtained when silicon was added along with another beta stabilizer. The influence of the beta stabilizers molybdenum, iron, vanadium, columbium, manganese, chromium and tungsten were evaluated in silicon-containing alpha-matrix alloys. A major emphasis was placed on molybdenum which was found to be the most favorable element in this group. An optimum addition of 0.5 to 1Mo was established for alloys containing 0.25 to 0.5Si. Larger amounts of molybdenum were found to decrease both creep resistance and thermal stability. Thermo-mechanical processing and heat treatment studies were conducted on two compositions, Ti-5Al-5Sn-2Zr-0.8Mo-0.5Si and Ti-5Al-5Sn-2Zr-0.8Mo-0.7Si. The best combination of tensile strength, creep strength and thermal stability was achieved by alphabeta processing the 0.5Si alloy followed by annealing at a temperature above the beta transus. Author
Descriptive Note:
Final rept. May 69-Jun 70,
Pages:
0132
Contract Number:
F33615-69-C-1405
File Size:
0.00MB
