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Examination of Dislocation Cores in Ni3Al Using High Resolution Electron Microscopy

Published online by Cambridge University Press:  26 February 2011

Martin A. Crimp  and
P. M. Hazzledine
Martin A. Crimp
Affiliation:
Department of Metallurgy and Science of Materials, University of Oxford, Parks Road, Oxford OXI 3PH, U.K.
P. M. Hazzledine
Affiliation:
Department of Metallurgy and Science of Materials, University of Oxford, Parks Road, Oxford OXI 3PH, U.K.
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Abstract

High resolution electron microscopy has been used to study the core structure of a/2[101] and a/3<112> dislocations in Ni3Al deformed in the range of increasing strength with temperature. a/3<112> coupled SISFs were found to lie on (111) and their structure agreed well with theoretical predictions. a/2[101] superpartials were always dissociated on (111) or (111) planes while the APB plane was found to be (010). Computer simulation of dislocation core structures were found to agree well with the observed dissociations. The APB width was found to increase significantly with increasing deformation temperature near the peak yield strength temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 131
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

1. Pope, D.P. and Ezz, S.S., Int. Metals Reviews 29 (3), 136 (1984).Google Scholar
2. Kear, B.H. and Wilsdorf, H.G.F., Trans. TMS-AIME 224, 382 (1962).Google Scholar
3. Takeuchi, S. and Kuramoto, E., Acta Met. 21, 45 (1973).Google Scholar
4. Paidar, V., Pope, D.P. and Vitek, V., Acta Met. 32 (3), 435 (1984).Google Scholar
5. Umakoshi, Y., Pope, D.P. and Vitek, V., Acta Met. 32 (3), 449 (1984).Google Scholar
6. Yamaguchi, M., Paidar, V., Pope, D.P. and Vitek, V., Phil. Mag. A 45 (5), 876 (1982).Google Scholar
7. Farkas, D. and Savino, E.J., Scripta Met., 22, 557 (1988).Google Scholar
8. Yoo, M.H., Daw, M.S. and Baskes, M.I., Proc. Atomisic Modeling in Materials beyond Pair Potentials, edited by Strolovitz, E.R. and Vitek, V., (ASM Publishing) (1988).Google Scholar
9. Korner, A., Phil. Mag. A 58 (3), 507 (1988).Google Scholar
10. Veyssiere, P., Horton, J.A., Yoo, M.H. and Liu, C.T., Phil. Mag. A 57 (1), 17 (1988).Google Scholar
11. Sun, Y.Q. and Hazzledine, P.M., Phil. Mag. A 58 (4), 603 (1988).Google Scholar
12. Eshelby, J.D. and Stroh, A.N., Phil. Mag. 42, 1401 (1951).Google Scholar
13. Enami, K. and Nenno, S., J. Phys. Soc. Jap. 25, 1517 (1968).Google Scholar
14. Baker, I. and Schulson, E.M., Phys. Stat. Sol. A 89, 163 (1985).Google Scholar
15. Veyssiere, P., Douin, J. and Beauchamp, P., Phil. Mag. A 51 (3), 469 (1985).Google Scholar
16. Baker, I., Schulson, E.M., and Horton, J.A., Acta Met. 35 (7), 1533 (1987).Google Scholar
17. Farkas, D., Private Communication, (1988).Google Scholar
18. Oblak, J.M. and Rand, W.H., Proc. 32nd Annual Meeting of the EMSA, edited by C.J Arceneaux (Claitor's Publishing Division, Baton Rouge, LA) 502 (1974).Google Scholar
19. Veyssiere, P., Yoo, M.H., Horton, J.A. and Liu, C.T., Submitted to Phil. Mag.Google Scholar