Preferences help
enabled [disable] Abstract
Number of results
2012 | 122 | 3 | 450-452
Article title

3D Discrete Dislocation Dynamics Applied to Interactions between Dislocation Walls and Particles

Title variants
Languages of publication
A 3D discrete dislocation dynamics model is presented that describes dislocation processes in crystals subjected to mechanical loadings at high temperatures. Smooth and curved dislocations are approximated by a set of short straight line segments. A Peach-Koehler force acting upon each segment involves all segment-to-segment interactions and externally applied stress. The segment velocity is a product of a corresponding mobility and the glide or climb component of the Peach-Koehler force. The model addresses interactions between dislocations and rigid spherical precipitates. A migration of low angle tilt boundaries situated in a field of precipitates is simulated as an example. The numerical implementation exploits symmetries of the model that yield an optimized and highly efficient numerical code. Results provide detailed insight into how dislocation arrangements surmount particle fields in 3D crystals.
  • Institute of Physics of Materials, Academy of Sciences, Ži v zkova 22, 616 62 Brno, Czech Republic
  • Department of Solid State Physics, Faculty of Sciences, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
  • Institute of Physics of Materials, Academy of Sciences, Ži v zkova 22, 616 62 Brno, Czech Republic
  • [1] B. Devincre, L.P. Kubin, Mater. Sci. Eng. A 234-236, 8 (1997)
  • [2] D. Weygand, L.H. Friedman, E. van der Giessen, A. Needleman, Mater. Sci. Eng. A 309-310, 420 (2001)
  • [3] D. Mordehai, E. Clouet, M. Fivel, M. Verdier, Philos. Mag. 88, 899 (2008)
  • [4] P. Hirth, J. Lothe, Theory of Dislocations, 2nd ed., Krieger Publ. Co., Malabar 1992
  • [5] W. Cai, A. Arsenlis, Ch.R. Weinberger, V.V. Bulatov, J. Mech. Phys. Sol. 54, 561 (2006)
  • [6] D. Holec, A. Dlouhý, Z. Metallkde 96, 558 (2005)
  • [7] T. Záležak, A. Dlouhý, Key Eng. Mater. 465, 115 (2011)
  • [8] D. Holec, B.Sc. Thesis, Masaryk University, Brno 2003
  • [9] J.H. Hausselt, W.D. Nix, Acta Metall. 25, 595 (1977)
  • [10] W. Blum, in: Materials Science and Technology, Vol. 6, Ed. H. Mughrabi, VCH Verlagsgesellschaft, Weinheim 1993
  • [11] J. Čadek, V. Šustek, M. Pahutová, Mater. Sci. Eng. A 225, 22 (1997)
Document Type
Publication order reference
YADDA identifier
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.