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- W341283372 abstract "Materials based on the intermetallic phases Ti/sub 3/Al (alpha 2) and TiAl (gamma) exhibit several attractive features that make them candidates for gas-turbine-engine applications. Low density, good oxidation resistance and high-temperature strength are such characteristics and could result in substitution for the nickel alloys currently used for components that operate at intermediate temperatures. The overall objectives of this portion of the program are to identify Ti/sub 3/Al alloys with properties compatible with gas-turbine applications and to develop preliminary processing and finishing techniques that are needed to make prototype hardware. The Ti-Al-Nb system has been shown to be the best system for alloy development. In this study, higher aluminum contents, at a constant niobium level, have been shown to improve stress-rupture properties at the expense of ductility at low and intermediate temperatures. Additions of zirconium, tin, hafnium or carbon to a Ti-Al-Nb base do not produce improved mechanical properties. Substitution of vanadium for some of the niobium in Ti-25Al-11Nb appears useful in reducing cost and density of the alloys. Lower oxygen content was shown to be one of the most effective means to improve-room temperature ductility." @default.
- W341283372 created "2016-06-24" @default.
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- W341283372 date "1981-06-01" @default.
- W341283372 modified "2023-09-27" @default.
- W341283372 title "Research to conduct an exploratory experimental and analytical investigation of alloys. Interim technical report, May 1977-December 1978" @default.
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