Mechanical anisotropy of a gamma titanium aluminide alloy after hot extrusion

Conference · Thu Jul 01 00:00:00 EDT 1999

OSTI ID:20001604

Oehring, M; Lorenz, U; Niefanger, R; Appel, F; Brokmeier, H G; Wagner, R; Clemens, H; Eberhardt, N

By hot extrusion below and above the {alpha} transus temperature equiaxed and predominantly lamellar microstructures were obtained in a Ti aluminide alloy. In order to examine a possible orientation dependence of mechanical properties the flow stress, the activation parameters of plastic deformation and the fracture toughness were determined parallel and perpendicular to the extrusion direction at room temperature and 700 C. The observed anisotropy in these properties may be mainly attributed to anisotropies in the microstructures, in particular to a preferential alignment of lamellae in lamellar microstructures.

• Research Organization: GKSS Research Centre, Geesthacht (DE)
• Sponsoring Organization: German Federal Ministry for Education and Research
• OSTI ID: 20001604
• Report Number(s): CONF-981104-; ISBN 1-55899-458-0; ISSN 1067-9995; TRN: US0000180
• Resource Relation: Conference: High-Temperature Ordered Intermetallic Alloys VIII, Materials Research Society Symposium Proceedings, Boston, MA (US), 11/30/1998--12/03/1998; Other Information: PBD: 1999; Related Information: In: High-temperature ordered intermetallic alloys VIII. Materials Research Society symposium proceedings: Volume 552, by George, E.P.; Mills, M.J.; Yamaguchi, Masaharu [eds.], [600] pages.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MICROSTRUCTURE
COMPRESSION STRENGTH
FRACTURE PROPERTIES
EXTRUSION
TITANIUM ALLOYS
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
MANGANESE ALLOYS
NIOBIUM ALLOYS
SILICON ALLOYS
INTERMETALLIC COMPOUNDS
FLOW STRESS
ORIENTATION
ANISOTROPY
EXPERIMENTAL DATA