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DOD HIGH STRENGTH TITANIUM ALLOY SHEET RESEARCH PROGRAM
NORTH AMERICAN AVIATION INC COLUMBUS OHIO
The report contains creep properties for times up to 1000 hours and deformations up to 1.0 for both the 5Al-5Sn-5Zr and 7Al-12Zr alloys at 900 and 1100 F. Tensile properties at roo temperature of creep specimens which did not fail during testing are presented for both alloys and compared with room temperature unexposed materi-AL PROPERTIES. Both alloys maintain excellent resistance to creep at 900 F. At 1100 F there is a considerable drop in creep properties when compared with the percentage drop in tensile properties. There is some difference in creep properties of the two alloys and embrittlement of the 7Al-12Zr lloy is more severe than the 5Al-5Sn-5Zr alloy. Author