Titanium alumnide alloys based on the gamma (TiAl) intermetallic compound are desirable for advanced aerospace applications. The properties which make these alloys attractive are low density, good elevated temperature tensile and creep strength, and good oxidation resistance. The main drawback to using TiAl alloys is their low ductility at temperatures up to approximately 760 deg C and the difficulty in forging and machining, the result of their low ductility. Powder metallurgy (PM) processing potentially minimizes the problems associated with conventional processing while maintaining the attractive properties. This paper will present the results of a study to determine the effects of hot isostatic pressing (HIP) conditions, and heat treatment on the microstructure and mechanical properties of consolidated Ti-48Al-2Cr-2Nb gamma titanium aluminide alloy powder made by gas atomization. Mechanical testing included room and elevated temperature tensile and stress rupture tests.
Effects of processing and heat treatment on microstructure and mechancial properties of gamma titanium aluminide powder compacts
Wirkungen der Verarbeitung und Wärmebehandlung auf Mikrostruktur und mechanische Eigenschaften von Pulverpreßlingen aus gamma-Titan-Aluminid
Science and Technology, Titanium, World Titanium Conference, 7 ; 2 ; 1083-1090
1993
8 Seiten, 9 Bilder, 5 Tabellen, 4 Quellen
Conference paper
English
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