Počet záznamů: 1

Transient Solute Drag in Migrating Grain Boundaries

  1. 1.
    0363703 - UFM-A 2012 RIV GB eng J - Článek v odborném periodiku
    Svoboda, Jiří - Fischer, F. D. - Liendl, M.
    Transient Solute Drag in Migrating Grain Boundaries.
    Acta Materialia. Roč. 59, č. 17 (2011), s. 6556-6562 ISSN 1359-6454
    Grant CEP: GA MŠk(CZ) OC10029
    Výzkumný záměr: CEZ:AV0Z20410507
    Klíčová slova: Grain boundary diffusion * Grain boundary migration * Grain boundary segregation
    Kód oboru RIV: BJ - Termodynamika
    Impakt faktor: 3.755, rok: 2011

    Understanding the solute drag in migrating grain boundaries or interfaces has been a topic in materials research since Cahn’s seminal paper in 1962. However, mostly steady-state solutions for solute segregation and drag in a migrating interface have been investigated. Here a new concept, based on the thermodynamic extremal principle, is introduced, which allows a detailed study of the transient processes in the migrating interface starting from a given initial configuration. The system is then described by two parameters, the first representing the amount of segregated solute in the grain boundary and the second the grain boundary position. Stability studies are performed using the perturbation concept. The model is demonstrated by simulations for a Fe–0.1 at.% Ni alloy taking different values for the grain boundary mobility and the driving force.
    Trvalý link: http://hdl.handle.net/11104/0199409