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Equilibrium and Dynamic Properties of Dislocation Dipoles

Published online by Cambridge University Press:  26 July 2012

Patrick Veyssiere
Patrick Veyssiere*
Affiliation:
[email protected], CNRS-ONERA, LEM, BP 72, Chatillon-cedex, 92322, France, 33 1 46 73 44 40, 33 1 46 73 41 55
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Abstract

This paper embraces several aspects related to dislocation self-organization in single slip. The formation of prismatic loops, seminal to the nucleation and growth of dislocation braids, is a dynamical process involving elastic dipolar interactions. Preliminary simulations of the concerted process of loop generation are presented. Elastic properties of dislocation dipoles are analysed as a function of dipole character. Equilibrium properties are investigated under the isotropic and anisotropic elastic approximations. The orientation dependence of the so-called dipole passing stress is examined, and its implication in the elementary mechanisms that take place under constrained deformation conditions, such as fatigue cycling, are discussed.

Keywords

dislocationssimulationmicrostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 976: Symposium EE – Size Effects in the Deformation of Materials – Experiments and Modeling , 2006 , 0976-EE02-04
Copyright
Copyright © Materials Research Society 2007

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References

1. Kuhlmann-Wilsdorf, D. and Wilsdorf, H. G. F., in Electron Microscopy and the Strength of Crystals, edited by Thomas, G. and Washburn, J., (Interscience Publishers, New York, 1963), p. 575.Google Scholar
2. Kubin, L. P. and Kratochvìl, J., Phil. Mag. A 80, 201 (2000).Google Scholar
3. Kratochvìl, J. and Saxlovà, M., Scripta Metall. Mater. 26, 113 (1992).Google Scholar
4. Kratochvìl, J. and Saxlovà, M., Phys. Scripta 49, 399 (1993).Google Scholar
5. Saxlovà, M. and Kratochvìl, J., Mater. Sci. Eng. A188, 69 (1994).Google Scholar
6. Kratochvìl, J. and Libovicky, S., Scripta Metall. 20, 1325 (1986).Google Scholar
7. Kratochvìl, J., Czechoslovak J Sci. B 38, 421 (1988).Google Scholar
8. Grégori, F. and Veyssière, P., Phil. Mag. A 82, 553 (2002).Google Scholar
9. Veyssière, P. and Grégori, F., Phil. Mag. Lett. 81, 795 (2001).Google Scholar
10. Veyssière, P. and Grégori, F., in Materials instabilities and patterning in metals, edited by Zbib, H. M., Campbell, G. H., Hughes, D. A., Levine, L. E., and Victoria, M., (Mater. Res. Soc. Symp. Proc. 683, Warrendale, PA, 2001) pp. BB 5.2.1-BB 5.2.6.Google Scholar
11. Veyssière, P. and Grégori, F., Phil. Mag. A 82, 567 (2002).Google Scholar
12. Veyssière, P. and Grégori, F., Phil. Mag. A 82, 579 (2002).Google Scholar
13. Johnston, W. G. and Gilman, J. J., J. of Appl. Phys. 31, 632 (1960).Google Scholar
14. Essmann, U. and Mughrabi, H., Phil. Mag. A 40, 731 (1979).Google Scholar
15. Shi, X., Saada, G., and Veyssière, P., Phil. Mag. Lett. 71, 1 (1995).Google Scholar
16. Grégori, F. and Veyssière, P., in Multiscale Phenomena in Materials - Experiments and Modeling, edited by Robertson, I. M., Lassila, D. H., Devincre, B., and Phillips, R., (Mater. Res. Soc. Symp. Proc. 578, Warrendale, PA, 2000), pp. 187–192.Google Scholar
17. Veyssière, P., Chiu, Y.-L., and Niewczas, M., Z. Metall. 97, 189 (2006).Google Scholar
18. Veyssière, P., Chiu, Y.-L., and Grégori, F., in Multiscale Phenomena in Materials--Experiments and Modeling Related to Mechanical Behavior, edited by Zbib, H. M., Lassila, D. H., Levine, L. E., and Hemker, K. J., (Mater. Res. Soc. Symp. Proc. 779, Warendale, PA, 2003), pp. W1.4.1- W1.4.6.Google Scholar
19. Veyssière, P. and Chiu, Y.-L., Phil. Mag. 87, in press (2007).Google Scholar
20. Brown, L. M., Phil. Mag. 86, 4055 (2006).Google Scholar
21. Mughrabi, H. and Pschenitzka, F., Phil. Mag. 85, 3029 (2005).Google Scholar
22. Schwartz, K. W. and Mughrabi, H., Phil. Mag. Lett. 86, 773 (2006).Google Scholar
23. Mughrabi, H., Phil. Mag. 18, 1211 (1968).Google Scholar
24. Mughrabi, H., Mater. Sci. Eng. A309–310, 237 (2001).Google Scholar
25. Veyssière, P., J. Mater. Sci. 41, 2691 (2006).Google Scholar