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Antiphase Domain Boundary Tubes in Ordered Alloys

Published online by Cambridge University Press:  28 February 2011

P.M. Hazzledine  and
Peter Hirsch
P.M. Hazzledine
Affiliation:
Department of Metallurgy and Science of Materials, Oxford University, Parks Road, OxfordOX1 3PH, U.K.
Peter Hirsch
Affiliation:
Department of Metallurgy and Science of Materials, Oxford University, Parks Road, OxfordOX1 3PH, U.K.
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Abstract

APB tubes have been observed in both a B2 and an L12 ordered alloy by means of weak beamtransmission electron microscopy. The tubes are attached to near—edge dislocations, either to single superdislocations or to superdipoles. The majority appearto have been formed by cross slip of screw dislocations. A computer model of the cross slip process in B2 alloys is described. The tubes formed by cross slip drag on edge dislocations and are capable in principle of explaining the extra work hardening shown by ordered over disordered crystals. The temperature and orientation dependence of the work hardening are similar to those of the proof stress which is also thought to be controlled by cross slip. This new mechanism of work hardening is shown to give order of magnitudeagreement with experiment.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 81: Symposium H – High-Temperature Ordered Intermetallic Alloys II , 1986 , 75
Copyright
Copyright © Materials Research Society 1987

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References

REFERENCES

1. Stoloff, N.S. and Davies, R.G., Trans. ASM 57, 247 (1964).Google Scholar
2. Stoloff, N.S., in Strengthening methods in Crystals, edited by Kelly, A. and Nicholson, R.B. (Applied Science, London, 1971), p. 193.Google Scholar
3. Pope, D.P. and Ezz, S.S., Int. Met. Revs. 29, 136 (1984).Google Scholar
4. Vidoz, A.E. and Brown, L.M., Philos. Mag. 7, 1167 (1962).CrossRefGoogle Scholar
5. Vasilyev, L.I. and Orlov, A.N., Fiz Metal ifetalloved 15, 481 (1963).Google Scholar
6. Vidoz, A.E., Phys. Stat. Sol. 28, 145 (1968).Google Scholar
7. Schoeck, G., Scripta Metall. 2, 283 (1968).Google Scholar
8. Schoeck, G., Acta Metall. 17, 147 (1969).Google Scholar
9. Hirsch, P.B. and Crawford, R.C., in Strength of Metals and Alloys, edited by Haasen, P. (Pergamon, Oxford, 1979), p. 89.CrossRefGoogle Scholar
10. Staton-Bevan, A.E., Philos. Mag. 47A, 939 (1983).CrossRefGoogle Scholar
11. Kuramoto, E. and Pope, D.P., Philos. Mag. 34, 593 (1976).CrossRefGoogle Scholar
12. Aoki, K. and Izumi, O., Acta Metall. 26, 1257 (1978).Google Scholar
13. Chou, C.T. and Hirsch, P.B., Philos. M-ag. A44, 1415 (1981).Google Scholar
14. Chou, C.T. and Hirsch, P.B., Proc. Roy. Soc. A387, 91 (1983).Google Scholar
15. Chou, C.T., Hirsch, P.B., McLean, M. and Hondros, E., Nature 300, 621 (1982).Google Scholar
16. Kear, B.H., Acta Metall. 14, 659 (1966).CrossRefGoogle Scholar
17. Chou, C.T., Hirsch, P.B., Hazzledine, W.M. and Anstis, G.R., Proc. of 3rd Asia Pacific Conference on Electron Microscopy, edited by Chung, M.F. (Applied Research Corporation, Singapore, 1984), p. 64.Google Scholar
18. Kear, B.H., Acta Metall. 12, 555 (1964).Google Scholar
19. Crawford, R.C., Philos. Mag. 33, 529 (1976).Google Scholar
20. Takeuchi, S. and Kuramoto, E., Acta Metall. 21, 415 (1973).Google Scholar
21. Paidar, V., Pope, D.P. and Vitek, V., Acta Met-all. 32, 435 (1984).CrossRefGoogle Scholar
22. Yoo, M.H., Scripta Metall. 20, 915 (1986).Google Scholar
23. Staton-Bevan, A.E. and Rawlings, R.D., Philos. Mag. 32, 787 (1975).Google Scholar
24. Sastry, S.M.L. and Ramaswamy, B., Philos. Mag. 32, 787 (1975).Google Scholar
25. Karnthaler, H.P. (private communication).Google Scholar
26. Suzuki, K., Ichihara, M. and Takeuchi, S., Acta Metall. 27, 193 (1979).Google Scholar
27. Korner, A., Karnthaler, H.P. and Hitzenberger, C., J. Elect. Microsc. 35, 1569 (1986).Google Scholar
28. Umakoshi, Y., Yamaguchi, M., Namba, Y. and Murakami, K., Acta Metall. 24, 89 (1976).Google Scholar
29. Yamaguchi, M. and Umakoshi, Y., Phys. Stat. Sol.(a) 43, 667 (1977).Google Scholar
30. Umakoshi, Y. and Yamaguchi, M., Scripta Metall 11, 211 (1977).Google Scholar
31. Takeuchi, S., Philos. Mag. A41, 541 (1980).Google Scholar