Microstructure of rolled Ti-46.5Al-4(Cr,Nb,Ta,B)
Conference
·
OSTI ID:20001589
An industrial Ti-46.5Al-4(Cr,Nb,Ta) alloy, with and without boron additions, has been successfully rolled to sheet 1.5mm thick. The microstructure of the sheet material has been characterized as a function of boron content and subsequent heat treatments. It is observed that rod-like (Ti-Ta)B precipitates are effective in refining the grain structure in both as-rolled and subsequently heat treated material. As-rolled microstructures rapidly cooled from the {alpha} + {gamma} phase field contain unstable {alpha}{sub 2}, which transforms to B2 phase on annealing below the {alpha} + {gamma} tranus. Annealing in the {alpha}-phase field can result in a designed fully lamellar microstructure.
- Research Organization:
- Univ. of Oxford (GB)
- OSTI ID:
- 20001589
- Report Number(s):
- CONF-981104--; ISBN 1-55899-458-0; ISSN 1067-9995
- Country of Publication:
- United States
- Language:
- English
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