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The Effect of Scandium on the Microstructure of Ti3Al

Published online by Cambridge University Press:  01 January 1992

Paul R. Munroe
Paul R. Munroe*
Affiliation:
School of Materials Science and Engineering, University of New South Wales, P.O.Box 1, Kensington, NSW 2033, Australia.
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Abstract

Using Pettifor Maps as a guide to alloying, scandium additions were made to Ti3Al to try and transform the crystal structure of this intermetallic alloy from ordered hexagonal to ordered face centred cubic. Scandium was found to have a solid solubility limit of about 6.4at.% in Ti3Al and preferentially occupy the titanium sublattice. According to the A3B Pettifor Map, these are criteria which should effect a change in crystal structure, however no such transformation was observed. Scandium additions in excess of the solid solubility limit resulted in the formation of SC2AI at grain boundaries and triple points.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 391
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1. Lipsitt, H.A., Schectman, D. and Schafrik, R.E., Metall. Trans. A 11A, 1369 (1980).Google Scholar
2. Blackburn, M.J. and Smith, M.P., U.S. Patent No. 4 292 077 (29 September 1981).Google Scholar
3. Srrycor, R., Williams, J.C. and Soffa, W.A., Metall. Trans. A 19A, 225 (1988).Google Scholar
4. Banerjee, D., Gogia, A.K., Nandi, T.K. and Joshi, V.A., Acta Metall. 36, 874 (1988).Google Scholar
5. Djanaethany, S., Servant, C. and Penelle, R., J. Mater. Res. 6, 969 (1991).Google Scholar
6. Chan, K.S., Metall. Trans. A 23A, 183 (1992).Google Scholar
7. Liu, C.T. and Inouye, H., Metall. Trans. A 10A, 1515 (1979).Google Scholar
8. Liu, C.T., Int. Metall. Rev. 29, 168 (1984).Google Scholar
9. Tarnacki, J. and Kim, Y-W., Scripta Metall. 22, 329 (1988).Google Scholar
10. Kumar, K.S. and Pickens, J.R., Scripta Metall. 22, 1015 (1988).Google Scholar
11. Huang, S.C., Hall, E.L. and Gigliotti, M.F.X., J. Mater. Res. 3, 1 (1988).Google Scholar
12. Turner, C. D., Powers, W.O. and Wert, J.A, Acta Metall. 37, 2635 (1989).Google Scholar
13. Virk, I.S. and Varin, R.A., Scripta Metall. 25, 85 (1991).Google Scholar
14. Lerf, R. and Morris, D.G., Acta Metall. 39, 2419 (1991).Google Scholar
15. Morris, D.G., J. Mater. Res. 7, 303 (1992).Google Scholar
16. Pettifor, D.G., Mater. Sci. Tech. 4, 675 (1988).Google Scholar
17. Liu, C.T., Horton, J.A. and Pettifor, D.G. in High Temperature Ordered Intermetallic Allovs III, edited by Liu, C.T., Taub, A.I., Stoloff, N.S. and Koch, C.C. (Mater. Res. Soc. Proc. 133, Pittsburgh, PA, 1989) pp. 37–42.Google Scholar
18. Munroe, P.R., Scripta Metall., in press (1992).Google Scholar
19. Spence, J.C.H. and Taftø, J., J. Microscopy 130, 147 (1983).Google Scholar
20. Taftø, J. and Spence, J.C.H., Science 218, 49 (1982).Google Scholar
21. Konitzer, D.G., Jones, I.P. and Fraser, H.L., Scripta Metall. 20, 265 (1985).Google Scholar
22. Eymond, S. and Parthe, E., J. Less-Common Metals 19, 441 (1969).Google Scholar
23. Munroe, P.R., to be submitted to Materials Forum (1992).Google Scholar
24. Massalski, T.B., Binary Alloy Phase Diagrams, vol. 1 (ASM Metals Park, 1986) p. 162.Google Scholar
25. Williams, J.C., Titanium Science and Technology, edited by Jaffee, R.I. and Burte, H.M., (Plenum Press, New York, NY 1973) pp. 1433–1492.Google Scholar
26. Blackburn, M.J., Trans. AIME 239, 1200 (1967).Google Scholar
27. Pettifor, D.G., Mater. Sci. Tech. 8, 345 (1992).Google Scholar
28. van Vucht, J.H.N. and Buschow, K.H.J., J. Less-Common Metals 10, 98 (1965).Google Scholar
29. van Vucht, J.H.N., J. Less-Common Metals 11, 308 (1965).Google Scholar
30. Sinha, A.K., TMS-AIME 245, 237 (1969).Google Scholar
31. Sinha, A.K., TMS-AIME 245, 911 (1969).Google Scholar
32. Durlu, N. and Inal, O.T., J. Mater. Sci. 27, 3225 (1992).Google Scholar