Mechanical anisotropy in sheets of {gamma}-TiAl alloys

Book · Wed Dec 31 00:00:00 EST 1997

OSTI ID:571728

Bartels, A; Hartig, C; Mecking, H ^[1]; Clemens, H ^[2]

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1. TU Hamburg-Harburg, Hamburg (Germany)
2. Plansee AG, Reutte (Austria)

At room temperature sheets of {gamma}-TiAl exhibit a higher yield stress in the rolling direction than in the transverse direction. Around 700 C the opposite behavior is observed. The texture mainly consists of a modified cube component. The tetragonal c-axis <001> is aligned in the sheet plane transversely to the rolling direction. Taken into account this special texture and the single crystal yield surface of {gamma}-TiAl the authors conclude that around 700 C the CRSS of super-dislocations is higher than the CRSS of ordinary dislocations. At RT the relation changes to the opposite.

• Sponsoring Organization: Deutsche Forschungsgemeinschaft, Bonn (Germany)
• OSTI ID: 571728
• Report Number(s): CONF-961202-; TRN: IM9806%%60
• Resource Relation: Conference: 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996; Other Information: PBD: 1997; Related Information: Is Part Of High-temperature ordered intermetallic alloys VII; Koch, C.C. [ed.] [North Carolina State Univ., Raleigh, NC (United States)]; Liu, C.T. [ed.] [Oak Ridge National Lab., TN (United States)]; Stoloff, N.S. [ed.] [Rensselaer Polytechnic Inst., Troy, NY (United States)]; Wanner, A. [ed.] [Univ. Stuttgart (Germany)]; PB: 799 p.; Materials Research Society symposium proceedings, Volume 460
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TITANIUM ALLOYS
ALUMINIUM ALLOYS
TEXTURE
MECHANICAL PROPERTIES
INTERMETALLIC COMPOUNDS
EXPERIMENTAL DATA
AMBIENT TEMPERATURE
DISLOCATIONS
ANISOTROPY
MICROSTRUCTURE
CHROMIUM ALLOYS
SILICON ADDITIONS