Development of {gamma}+{alpha}{sub 2}+B2 type titanium aluminide for forged turbine rotors

Book · Sun Dec 31 00:00:00 EST 1995

OSTI ID:225135

Tetsui, Toshimitsu ^[1]

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1. Mitsubishi Heavy Industries, Ltd., Nagasaki (Japan)

In order to apply TiAl for forged turbine rotors, hot deformability at manufacturing process and high temperature strength at application are both required. For these requirements a new {gamma}+{alpha}{sub 2}+B2 type TiAl (named KAT-3) has been developed. The alloy composition is Ti-45Al-8Nb-2Cr (at%) and this alloy consists of three phases: {gamma}, {alpha}{sub 2} and B2. Because B2 phase has excellent hot deformability and {gamma}/{alpha}{sub 2} lamellar structure has excellent high temperature strength, the above contradictory requirements for TiAl can both be achieved by optimizing the manufacturing process. In this paper various properties required for turbine rotor materials of this alloy were investigated, especially in comparison with Inconel 713C.

• OSTI ID: 225135
• Report Number(s): CONF-950201-; ISBN 0-87339-304-X; TRN: IM9621%%65
• Resource Relation: Conference: Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Las Vegas, NV (United States), 12-16 Feb 1995; Other Information: PBD: 1995; Related Information: Is Part Of Gamma titanium aluminides; Kim, Y.W. [ed.] [UES, Inc., Dayton, OH (United States). Materials and Processes Div.]; Wagner, R. [ed.] [GKSS Research Center, Geesthacht (Germany). Inst. for Materials Research]; Yamaguchi, Masaharu [ed.] [Kyoto Univ. (Japan). Dept. of Materials Science and Engineering]; PB: 1023 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
33 ADVANCED PROPULSION SYSTEMS
TITANIUM ALLOYS
MICROSTRUCTURE
MECHANICAL PROPERTIES
ALUMINIUM ALLOYS
NIOBIUM ALLOYS
CHROMIUM
GAS TURBINE ENGINES
ROTORS
INTERMETALLIC COMPOUNDS
CASTING
CHEMICAL COMPOSITION
HEAT TREATMENTS
FORGING
OPTICAL MICROSCOPY
TRANSMISSION ELECTRON MICROSCOPY
GRAIN SIZE
LAMELLAE
TENSILE PROPERTIES
FATIGUE
OXIDATION
CREEP
ELONGATION
EXPERIMENTAL DATA