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Microstructure of Rapidly Solidified Ti3Al Alloys

Published online by Cambridge University Press:  25 February 2011

A. G. Jackson ,
K. R. Teal ,
D. Eylon ,
F. H. Froes  and
S. J. Savage
A. G. Jackson
Affiliation:
Systems Research Laboratories, Inc., 2800 Indian Ripple Road, Dayton, OH 45440
K. R. Teal
Affiliation:
Air Force Wright Aeronautical Laboratories, Materials Laboratory, AFWAL/MLLS, Wright-Patterson Air Force Base, OH 45433
D. Eylon
Affiliation:
Metcut-Materials Research Group, P.O. Box 33511, Wright-Patterson Air Force Base, OH 45433
F. H. Froes
Affiliation:
Air Force Wright Aeronautical Laboratories, Materials Laboratory, AFWAL/MLLS, Wright-Patterson Air Force Base, OH 45433
S. J. Savage
Affiliation:
Air Force Wright Aeronautical Laboratories, Materials Laboratory, AFWAL/MLLS, Wright-Patterson Air Force Base, OH 45433
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Abstract

The microstructures of ordered Ti3Al-lZr (alpha2 +Zr) and Ti-Al-Nb alloys produced by ingot metallurgy (IM) and by rapid solidification (RS) are compared. The RS Ti3Al-iZr (alpha2 structure) alloy displayed small antiphase domains (APD) of 10–20 nm in the as-produced condition, but large grain size. The latter observation is rationalized in terms of the cooling history used to produce the material. The RS Ti-Al-Nb alloy exhibited an equiaxed microstructure. The IM Ti-Al-Nb material displays a complete change in microstructure between 1010°C and 1035°C, indicating a narrow alpha+beta phase field.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 58 , 1985 , 365
Copyright
Copyright © Materials Research Society 1986

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References

REFERENCES

1.Sastry, S. Y. L. and Lipsitt, H. A., Met. Trans. A, 8A, 1543 (1977).Google Scholar
2.Savage, S. J. and Froes, F. H., J. Metals, 36 (4), 20–33 (1984).Google Scholar
3.Williams, D. B., Practical Analytical Electron Microscopy in Materials Science (Philips Electronic Instruments, Inc., Mahwah, NJ, 1984), p. 128.Google Scholar