Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-25T15:37:35.793Z Has data issue: false hasContentIssue false
  • English
  • Français

High Temperature Ordered Intermetallic Alloys

Published online by Cambridge University Press:  28 February 2011

D. P. Pope
D. P. Pope*
Affiliation:
University of Pennsylvania, Department of Materials Science and Engineering, Philadelphia, PA 19104-6391
Get access

Abstract

This paper is intended to be a general introduction to this conference and is therefore not a review of the state of our current knowledge. Instead, it will address questions like the following: Why are intermetallic compounds interesting? What alloys are being studied, and which are being ignored? Since most research work is now being performed on L12 alloys, with by far the greatest emphasis on Ni3Al, the balanceof the paper will concentrate on strengthening mechanisms and mechanisms of ductility control in Ni3Al, pointing out the interesting questions and controversies which arose during this conference.

The conclusions to be drawn from this paper are that ordered intermetallic alloys are very valuable materials for high temperature use, but engineers probably must become more sophisticated in the use of materials with limited ductilities at low temperatures before intermetallics will gain widespread usage. Furthermore, additional research needs to be performed on more complex intermetallic compounds than L12 since L12 compounds, as a group, do not have particularly high melting temperatures. However,since alloys with complex structures, e.g. Laves phases, are well known for their brittleness at low temperatures, it is all the more important that the properties of such alloys be studied and methods found to improve their ductilities.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 81: Symposium H – High-Temperature Ordered Intermetallic Alloys II , 1986 , 3
Copyright
Copyright © Materials Research Society 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Lipsitt, H.A., Shechtman, D. and Shechtman, R.E. and Schafrik, R.E., Met. Trans. A, 6A, 1991 (1975).CrossRefGoogle Scholar
2. Flinn, P.A., Trans TMS-AIME, 218, 145 (1960).Google Scholar
3. Ray, R., Panchanathan, V. and Isserow, S., J. of Metals 35(6), 30 (1983).Google Scholar
4. “Structural Uses for Ductile Ordered Alloys”, National Materials Advisory Board Rpt. #NMAB-419, National Academy Press, Washington, D.C. (1984).Google Scholar
5. Girifalco, L.A. in Diffusion, ASM, Metals Park, Ohio, p. 185 (1973).Google Scholar
6. Liu, C.T., Int. Met. Rev. 29, 168 (1984).CrossRefGoogle Scholar
7. Morcinkowski, M.J., Taylor, M.E. and Kayser, F.X., J. Mat. Sci. 10, 406 (1975).CrossRefGoogle Scholar
8. Pope, D.P. and Ezz, S.S., Int. Met. Rev. 29, 136 (1984).CrossRefGoogle Scholar
9. Paidar, V., Pope, D.P., and Vitek, V., Acta Met. 32, 435 (1984).CrossRefGoogle Scholar
10. Umakoshi, Y., Yamaguchi, M., Namba, Y. and Murakami, K., Acts Met. 24, 89 (1976).CrossRefGoogle Scholar
11. Ochiai, S., Oya, Y. and Suzuki, T., Acta Met. 32, 289 (1984).CrossRefGoogle Scholar
12. Takasugi, T. and Izumi, O., Acta Met. 33, 1247 (1985).CrossRefGoogle Scholar
13. Aoki, K. and Izumi, O., Nippon Kinzoku Gakkaishi 4A, 1190 (1979).Google Scholar
14. Liu, C.T., White, C.L. and Horton, J.A., Acta Met. 33, 213 (1985).CrossRefGoogle Scholar
15. White, C.L., Padgett, R.A., Liu, C.T. and Yalisove, S.M., Scr. Met. 18, 1417 (1984).CrossRefGoogle Scholar
16. Horton, J.A. and Miller, M.K., Acta Met. 35, 133 (1987).CrossRefGoogle Scholar