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

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Publikace nespadá pod Pedagogickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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ZÁLEŽÁK Tomáš DLOUHÝ A.

Rok publikování 2012
Druh Článek v odborném periodiku
Časopis / Zdroj Acta physica polonica A
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www http://przyrbwn.icm.edu.pl/APP/PDF/122/a122z3p06.pdf
Doi http://dx.doi.org/10.12693/APhysPolA.122.450
Klíčová slova HIGH-TEMPERATURE DEFORMATION; PLASTICITY
Popis 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.
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