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In-Situ TEM Observation of a Structural Change in a Near Σ=3-Twist Boundary In Ordered Cu3Au.

Published online by Cambridge University Press:  25 February 2011

F. D. Tichelaar  and
F. W. Schapink
F. D. Tichelaar
Affiliation:
Laboratory of Metallurgy, Delft University of Technology, Rotterdamseweg 137, 2628 AL Delft, The Netherlands
F. W. Schapink
Affiliation:
Laboratory of Metallurgy, Delft University of Technology, Rotterdamseweg 137, 2628 AL Delft, The Netherlands
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Abstract

In this paper the structure of a (011)-Σ=3 twist boundary in ordered Cu3Au is analysed geometrically. Wrong nearest-neighbour bonds can be avoided by facetting on an atomic scale along common {112} planes, together with a rigid-body translation parallel to one of the facets as measured in earlier work. In the specimen different translational states were found in different areas of the [165]-Σ=3 boundary by transmission electron microscopy (TEM). One of the translations was in agreement with the model, the other was associated with a presumably energetically more unfavourable structure. The in situ observation at 230 °C of the motion of the dislocation separating the different boundary areas was associated with a transformation of the boundary structure with the higher energy into the more favourable structure. Therefore, it is likely that the driving force of the dislocation motion was a difference in boundary energy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 238: Symposium Cb – Structure and Properties of Interfaces in Materials , 1991 , 145
Copyright
Copyright © Materials Research Society 1992

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References

LITERATURE

1. Valiev, R.Z., Gertsman, V.Yu., and Kaibyshev, O.A., Phys. Stat. Sol. (a) 22, 11 (1986).Google Scholar
2. Christian, J.W., in Dislocations in Solids, vol. 3, edited by Nabarro, F.R.N. (North Holland Publishing Company, 1980), p. 165.Google Scholar
3. Mori, T., and Tangri, K., Metall. Trans. 10A, 733 (1979).Google Scholar
4. Grabski, M.W., J. de Physique Coll. 49, C5–497 (1988).Google Scholar
5. Thibault-Desseaux, J., and Elkajbaji, M., J. de Physique Coll. 49, C5–283 (1988).Google Scholar
6. Babcock, S.E., and Balluffi, R.W., Acta Metall. B 2, 2357 (1989).Google Scholar
7. Tichelaar, F.D. and Schapink, F.W., Phil. Mag. A 63, 207 (1991).Google Scholar
8. Lillo, T.M., Plichta, M.R., and Hackney, S.A., Scr. Metall. 24, 369 (1990).Google Scholar
9. Tichelaar, F.D., PhD thesis, Delft University of Technology, Grain Boundary Structure in Ordered Alloys (1990).Google Scholar
10. Wolf, D., Acta Metall. 22, 2823 (1989).Google Scholar
11. Tichelaar, F.D. and Schapink, F.W., Phil. Mag. A 54, L55 (1986).Google Scholar
12. Tichelaar, F.D. and Schapink, F.W., J. de Physique Coll. 49, C5–293 (1988).Google Scholar
13. CSERO Division of Chemical Physics, P.O. Box 160, Clayton, Victoria, 3168. Australia.Google Scholar