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Some Effects of Composition and Microstructure on the B2↔DO3 Ordered Phase Transition in Fe3Al Alloys

Published online by Cambridge University Press:  01 January 1992

P.J. Maziasz ,
C.G. McKamey ,
O.B. Cavin ,
C.R. Hubbard  and
T. Zacharia
P.J. Maziasz
Affiliation:
Oak Ridge National Laboratory, P.O. Box 2008 Oak Ridge, TN 37831 -6114
C.G. McKamey
Affiliation:
Oak Ridge National Laboratory, P.O. Box 2008 Oak Ridge, TN 37831 -6114
O.B. Cavin
Affiliation:
Oak Ridge National Laboratory, P.O. Box 2008 Oak Ridge, TN 37831 -6114
C.R. Hubbard
Affiliation:
Oak Ridge National Laboratory, P.O. Box 2008 Oak Ridge, TN 37831 -6114
T. Zacharia
Affiliation:
Oak Ridge National Laboratory, P.O. Box 2008 Oak Ridge, TN 37831 -6114
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Abstract

Binary Fe-28 at.% Al alloys (Fe3Al-type) transform from B2→DO3 ordered phases at 550°C upon cooling. More complex Fe-28Al alloys can have B2↔DO3 transition temperatures that range from 530 to 670°C. The kinetics of the B2→DO3 ordered phase transition also appear to be affected by alloy composition and by matrix dislocation microstructure. The binary and Nb-containing ternary alloys have rapid B2→DO3 transition kinetics during cooling. However, the ternary or more complex alloys that contain Cr have relatively slower phase transition kinetics during similar cooling. Deformation of a complex Fe-28Al-5Cr alloy in the B2 phase regime creates a very high matrix dislocation concentration, which coincides with complete suppression of the B2→DO3 phase transition during cooling.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 209
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1. McKamey, C.G., DeVan, J.H., Tortorelli, P.F., and Sikka, V.K., J. Mater. Res. 6, 1779 (1991).Google Scholar
2. McKamey, C.G. and Horton, J.A., Metall. Trans. 20A, 751 (1989).Google Scholar
3. Maziasz, P.J., McKamey, C.G. and Hubbard, C.R., Mat. Res. Soc. Symp. Proc. Vol. 186 (1991) p. 349.Google Scholar
4. Huang, Y., Yang, W., and Chen, G., elsewhere in this proceedings.Google Scholar
5. McKamey, C.G., Horton, J.A. and Liu, C.T., Scripta Met. 22, 1679 (1988).Google Scholar
6. McKamey, C.G. and Liu, C.T., Scripta Met. et Mat. 24, 2119 (1990).Google Scholar
7. Castagna, A. and Stoloff, N.S., Scripta Met. et Mat. 26, 673 (1992).Google Scholar
8. David, S.A. and Zacharia, T., to be published in Welding J., 1992.Google Scholar
9. Sikka, V.K., McKamey, C.G., Howell, C.R. and Baldwin, R.H., Oak Ridge National Laboratory Report ORNL/TM-11796 (March, 1991).Google Scholar
10. Sikka, V.K., in Proc. First Internat. Conf. Heat-Resistant Materials, ASM-lnternational, Materials Park, OH (1991) p. 141.Google Scholar
11. Liu, C.T., McKamey, C.G. and Lee, E.H., Scripta Met. et Mat. 24, 385 (1990).Google Scholar
12. McKamey, C.G., Maziasz, P.J., and Jones, J.W., J. Mater. Res. 7, 2089 (1992).Google Scholar