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Acceptable Aluminum Additions for Minimal Environmental Effect in Iron-Aluminum Alloys*

Published online by Cambridge University Press:  01 January 1992

Vinod K. Sikka ,
Srinath Viswanathan  and
SANJAY Vyas
Vinod K. Sikka
Affiliation:
Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831-6083
Srinath Viswanathan
Affiliation:
Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831-6083
SANJAY Vyas
Affiliation:
Carnegie Mellon University, 5000 Forbes Avenue, Pittsburghs, PA 15213
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Abstract

A systematic study of iron-aluminum alloys has shown that Fe-16 at. % Al alloys are not very sensitive to environmental embrittlement. The Fe-22 and -28 at. % Al alloys are sensitive to environmental embrittlement, and the effect can be reduced by the addition of chromium and through the control of grain size by additions of zirconium and carbon. The Fe-16 at. % Al binary, and alloys based on it, yielded over 20% room-temperature (RT) elongation even after high-temperature annealing treatments at 1100°C. The best values for the Fe-22 and -28 at. % Al-base alloys after similar annealing treatments were 5 and 10%, respectively. A multi-component alloy, FAP, based on Fe-16 at. % Al was designed, which gave an RT ductility of over 25%.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 971
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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