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Susceptibility of Iron-Rich Fe-Al Alloys to Embrittlement by Hydrogen and Water

Published online by Cambridge University Press:  22 February 2011

R. J. Lynch  and
L. A. Heldt
R. J. Lynch
Affiliation:
Department of Metallurgical and Materials Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295
L. A. Heldt
Affiliation:
Department of Metallurgical and Materials Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295
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Abstract

Iron-rich Fe-Al alloys have been tensile tested in moist air and dry oxygen at a strain rate of 3.3×10−4 s−1. Moist air did not cause embrittlement until the composition reached 18-20% Al. Alloys with lower aluminum contents were embrittled when tested in hydrogen gas. The environmental sensitivity of these alloys was further investigated by examining the effects of strain rate on the ductility. For the most part, no significant strain rate effects were observed in the low aluminum alloys; strain rates of up to 3.3×10−1 s−1 were not fast enough to prevent embrittlement. In contrast, the ductility of Fe-35 at.% Al did increase with increasing strain rate in air and hydrogen; at a strain rate of 3.3×10−1 s−1 the elongations approached that of vacuum.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 963
Copyright
Copyright © Materials Research Society 1995

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References

1. Liu, C.T., Lee, E.H., and McKamey, C.G., Scripta Met., 23, 875 (1989).Google Scholar
2. Lynch, R.J., Milligan, W.W. and Heldt, L.A., Parkins Symposium on Fundamental Aspects of Stress Corrosion Cracking. TMS Proa, 117 (1992).Google Scholar
3. Lynch, R.J., Gee, K.A. and Heldt, L.A., Scripta Met., 30, 945 (1994).Google Scholar
4. Kasul, D.B. and Heldt, L.A., Met. Trans. A, 25A, 1285–1290 (1994).Google Scholar
5. Vyas, S., Viswanathan, S., and Sikka, V.K., Scripta Met., 27, 185 (1992).Google Scholar
6. Stoloff, N.S., Castagna, A., Scott, J. and Duquette, D.J., Processing. Properties, and Applications of Iron Aluminides. TMS Proa, 271 (1994).Google Scholar
7. Bozso, F., Ertl, G., Grunze, M. and Weiss, M., Appl. Surface Set., 1, 103 (1977).Google Scholar
8. Hayward, D.O., Chemisorption and Reactions on Metallic Films, ed. Anderson, J.R., Vol. 1 (Academic Press, London, 1971), p. 225.Google Scholar
9. Wei, R.P., Pao, P.S., Hart, R.G., Weir, T.W, and Simmons, G.W., Met. Trans. A, 11A, 151 (1980).Google Scholar
10. Lu, Q. and Hultquist, G., Corrosion Science, Vol. 36, No. 6, 927 (1994).Google Scholar
11. Hancock, G.G. and Johnson, H. H., Trans. Met. Soc.of AIME, 236, April, 513 (1966).Google Scholar
12. Lynch, R.J., Harburn, M., Maucione, L. and Heldt, L.A., Scripta Met., 30, 1157 (1994).Google Scholar
13. Lynch, R.J. and Heldt, L.A., Scripta Met., 30, 895 (1994).Google Scholar
14. Kasul, D.B. and Heldt, L.A., Scripta Met., 25, 1047 (1991).Google Scholar
15. Shan, A. and Lin, D., Scripta Met., 27, 95 (1992).Google Scholar
16. Moret, M., Jongenburger, C.P. and Zhuang, L., Scripta Met., 31, 1135 (1994).Google Scholar
17. Kasul, D.B., Ph.D. Dissertation, Michigan Technological University, 1992.Google Scholar