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Grain Boundary Dislocation Structure and Motion in an Aluminum Σ=3 [011] Bicrystal

Published online by Cambridge University Press:  10 February 2011

D. L. Medlin ,
S. M. Foiles  and
C. B. Carter
D. L. Medlin
Affiliation:
Sandia National Laboratories, Livermore California 94551
S. M. Foiles
Affiliation:
Sandia National Laboratories, Livermore California 94551
C. B. Carter
Affiliation:
Department of Chemical Engineering and Materials Science, Amundson Hall, University of Minnesota, Minneapolis, MN 55455.
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Abstract

High-resolution transmission electron microscopy (HRTEM) observations are presented of a/3[111] grain-boundary dislocations in an aluminum Σ=3[011] bicrystal. These dislocations are present on both (111) (coherent twin) and (211) (incoherent twin) facets of the bicrystal boundary. The dislocations on the coherent twin facet migrate by a climb process that increases the thickness of the twinned material. These dislocations originate on a Σ=3 (211) incoherent twin boundary where they are closely spaced and dissociated in a wide core configuration. Atomistic calculations of the defect structure and interaction of multiple a/3[111] grain boundary dislocations are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 466: Symposium G – Atomic Resolution Microscopy of Surfaces and Interfaces , 1996 , 125
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

1. Daw, M.S., Foiles, S.M., and Baskes, M.I., Mat. Sci. Rep. 9, 251 (1993).Google Scholar
2. Ercolessi, F. and Adams, J.B., Europhysics Letters 26, 583 (1994).Google Scholar
3. Medlin, D.L., Mills, M.J., Stobbs, W.M., Daw, M.S., and Cosandey, F., in Atomic-Scale Imaging of Surfaces and Interfaces, eds. Biegelsen, D.K. et al. (MRS Proc. 295, Pittsburgh, PA, 1993) p. 91.Google Scholar
4. Medlin, D.L., Stobbs, W.M., Weinberg, J.D., Angelo, J.E., Daw, M.S., and Mills, M.J., in Defect-Interface Interactions, eds. Kvam, E.P. et al. (MRS Proc. 319, Pittsburgh, PA, 1994) p. 273.Google Scholar
5. Medlin, D.L., Carter, C.B., Angelo, J.E. and Mills, M.J., to be published in Phil. Mag. A75(3), 773 (1997).Google Scholar
6. Shamsuzzoha, M., Smith, D.J., and Deymier, P.A., Phil. Mag. A64 (1), 245 (1991).Google Scholar
7. Merkle, K.L., J. Phys. Chem. Solids 55 (10), 991 (1994).Google Scholar
8. Wolfenden, A., Radiation Effects 14, 225 (1972).Google Scholar
9. Pond, R.C., Proc. Roy. Soc., Lond. A 357, 471 (1977).Google Scholar
10. Pond, R.C., in Grain Boundary Structure and Kinetics, ed. Baluffi, R.W., (ASM, Metals Park OH, 1979) p. 13.Google Scholar
11. Vitek, V., Sutton, A.P., Smith, D.A., and Pond, R.C., in Grain Boundary Structure and Kinetics, ed. Baluffi, R.W., (ASM, Metals Park OH, 1979) p. 115.Google Scholar
12. e.g., Hirth, J.P. and Lothe, J., Theory of Dislocations (Krieger, Malabar FL, 1992).Google Scholar