Effect of a B2/gamma structure on the tensile properties of the cast gamma titanium aluminide Ti48Al2Cr2Nb

The room temperature tensile properties of a duplex cast Ti)48Al)2Cr)2Nb alloy are shown to be independent of the presence of alpha -2 vs. B2 in the gamma matrix. Oxygen in the range 600-1800 ppm did not affect the strength or ductility of the cast alloy. The strength and ductility of duplex cast ga...

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Bibliographic Details
Published in:Scripta metallurgica et materialia 1993-12, Vol.29 (11), p.1409-1414
Main Authors: Kelly, T.J., Juhas, M.C., Huang, S.C.
Format: Article
Language:English
Subjects:
360102 - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
Applied sciences
CHROMIUM ALLOYS
Cross-disciplinary physics: materials science
rheology
Deformation, plasticity, and creep
Exact sciences and technology
MATERIALS SCIENCE
MECHANICAL PROPERTIES
Metals. Metallurgy
MICROSTRUCTURE
NIOBIUM ALLOYS
Physics
TENSILE PROPERTIES
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
Treatment of materials and its effects on microstructure and properties
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Summary:The room temperature tensile properties of a duplex cast Ti)48Al)2Cr)2Nb alloy are shown to be independent of the presence of alpha -2 vs. B2 in the gamma matrix. Oxygen in the range 600-1800 ppm did not affect the strength or ductility of the cast alloy. The strength and ductility of duplex cast gamma titanium aluminide is controlled by the aluminum content and equiaxed gamma grain size rather than the phase morphology. The B2 phase is shown to be detrimental to the creep resistance.
ISSN:0956-716X
DOI:10.1016/0956-716X(93)90328-P