Mechanical properties of a {beta} containing Ti-Al-Cr-alloy at ambient and elevated temperatures

Book · Sat Jul 01 00:00:00 EDT 1995

OSTI ID:72511

Chen, W R; Wang, J; Zhang, B; Wan, X; Chen, W J ^[1]

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1. Shanghai Univ. of Technology (China). Inst. of Materials Science

The mechanical properties of a {beta}-containing Ti-Al-Cr alloy were investigated at ambient and elevated temperatures. The results show that the Ti-Al-Cr alloy containing the {beta} phase has a very high tensile strength but a poor ductility at ambient temperature, and that higher ductility is obtained at high temperatures. The temperature dependence of mechanical properties is found to be sensitive to the strain rate during the test. Fractography shows that the fracture mode changes from fully brittle to ductile-brittle mixture with the increased temperature. All the results suggest that the triple-phased TiAl alloys ({alpha}{sub 2} + {beta} + {gamma}) may have the combined mechanical properties of the dual-phased Ti{sub 3}Al ({alpha}{sub 2} + {beta}) and dual-phased TiAl ({alpha}{sub 2} + {gamma}) alloys.

• OSTI ID: 72511
• Report Number(s): CONF-941144--; ISBN 1-55899-265-0
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
DUCTILE-BRITTLE TRANSITIONS
EXPERIMENTAL DATA
FRACTURE PROPERTIES
HEAT RESISTING ALLOYS
INTERMETALLIC COMPOUNDS
MECHANICAL PROPERTIES
TENSILE PROPERTIES
TITANIUM BASE ALLOYS