Počet záznamů: 1  

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

  1. 1. 0387715 - UFM-A 2013 RIV PL eng J - Článek v odborném periodiku
    Záležák, Tomáš - Dlouhý, Antonín
    3D Discrete Dislocation Dynamics Applied to Interactions between Dislocation Walls and Particles.
    Acta Physica Polonica. A. Roč. 122, č. 3 (2012), s. 450-452 ISSN 0587-4246.
    [International Symposium on Physics of Materials /12./ - ISPMA 12. Prague, 04.09.2011-08.09.2011]
    Grant CEP: GA ČR GD106/09/H035; GA ČR GA202/09/2073; GA MŠk OC 162
    Výzkumný záměr: CEZ:AV0Z20410507
    Klíčová slova: 3D discrete dislocation dynamics * tilt boundary * migration * diffusion * pecipitation hardening
    Kód oboru RIV: JG - Hutnictví, kovové materiály
    Impakt faktor: 0.531, rok: 2012

    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.
    Trvalý link: http://hdl.handle.net/11104/0216677