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Microstructure of Rolled Ti-46.5Al-4(CrNb,Ta,B)

Published online by Cambridge University Press:  10 February 2011

B. J. Inkson  and
H. Clemens
B. J. Inkson
Affiliation:
Dept. of Materials, University of Oxford, Oxford, OX1 3PH, U.K.
H. Clemens
Affiliation:
Institut füir Metallkunde, Universitit Stuttgart, Seestrasse 71, D-70174, Stuttgart, GERMANY.
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Abstract

An industrial Ti-46.5A1–4(CrNb,Ta) alloy, with and without boron additions, has been successfully rolled to sheet 1.5mm thick. The microstructure of the sheet material has been characterised 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 α + γ phase field contain unstable α2, which transforms to B2 phase on annealing below the α + γ tranus. Annealing in the α-phase field can result in a designed fully lamellar microstructure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 552: Symposium KK – High-Temperature Ordered Intermetallic Alloys VIII , 1998 , KK3.12.1
Copyright
Copyright © Materials Research Society 1999

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References

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