The creep deformation and elevated temperature microstructural stability of a two-phase TiAl/Ti{sub 3}Al lamellar alloy

Conference · Tue Aug 01 00:00:00 EDT 1995

OSTI ID:78368

Bartholomeusz, M F; Wert, J A ^[1]

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1. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Material Science and Engineering

Enhanced work hardening of the phases in the lamellar microstructure has been cited as an explanation for the lower minimum creep rates of a two-phase TiAl/Ti{sub 3}Al lamellar alloy compared with the minimum creep rates of the individual TiAl and Ti{sub 3}Al single-phase alloys tested between 980 K and 1,130 K. This proposition is confirmed by TEM observations. Thermal and thermomechanical exposure result in the microstructural evolution, which increases the minimum creep rate ({dot {var_epsilon}}{sub min}) of the lamellar alloy. The effect of microstructural evolution on {dot {var_epsilon}}{sub min} will be discussed in the present paper.

• OSTI ID: 78368
• Report Number(s): CONF-941144-; ISBN 1-55899-265-0; TRN: IM9531%%421
• Resource Relation: Conference: Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 28 Nov - 9 Dec 1994; Other Information: PBD: 1995; Related Information: Is Part Of High-temperature ordered intermetallic alloys VI: Part 1. Materials Research Society symposium proceedings Volume 364; Horton, J. [ed.] [Oak Ridge National Lab., Oak Ridge, TN (United States)]; Baker, I. [ed.] [Dartmouth College, Hanover, NH (United States)]; Hanada, Shuji [ed.] [Tohoku Univ., Sendai (Japan)]; Noebe, R.D. [ed.] [NASA Lewis Research Center, Cleveland, OH (United States)]; Schwartz, D.S. [ed.] [McDonnell Douglas Aerospace, St. Louis, MO (United States)]; PB: 713 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TITANIUM ALLOYS
MICROSTRUCTURE
DEFORMATION
ALUMINIUM ALLOYS
CREEP
INTERMETALLIC COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
THERMOMECHANICAL TREATMENTS