Atomistically informed dislocation dynamics in fcc crystals

Martínez Sáez, Enrique; Marian, Jaime; Arsenlis, A.; Victoria, Maximo Pedro y Perlado Martín, José Manuel (2008). Atomistically informed dislocation dynamics in fcc crystals. "Journal of the Mechanics and Physics of Solids", v. 56 (n. 3); pp. 869-895. ISSN 0022-5096.


Título: Atomistically informed dislocation dynamics in fcc crystals
  • Martínez Sáez, Enrique
  • Marian, Jaime
  • Arsenlis, A.
  • Victoria, Maximo Pedro
  • Perlado Martín, José Manuel
Tipo de Documento: Artículo
Título de Revista/Publicación: Journal of the Mechanics and Physics of Solids
Fecha: Marzo 2008
Volumen: 56
Palabras Clave Informales: Dislocation dynamics; fcc plasticity; cross-slip; dislocation locks; numerical methods
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Ingeniería Nuclear [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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We develop a nodal dislocation dynamics (DD) model to simulate plastic processes in fcc crystals. The model explicitly accounts for all slip systems and Burgers vectors observed in fcc systems, including stacking faults and partial dislocations. We derive simple conservation rules that describe all partial dislocation interactions rigorously and allow us to model and quantify cross-slip processes, the structure and strength of dislocation junctions, and the formation of fcc-specific structures such as stacking fault tetrahedra. The DD framework is built upon isotropic non-singular linear elasticity and supports itself on information transmitted from the atomistic scale. In this fashion, connection between the meso and micro scales is attained self-consistently, with all material parameters fitted to atomistic data. We perform a series of targeted simulations to demonstrate the capabilities of the model, including dislocation reactions and dissociations and dislocation junction strength. Additionally we map the four-dimensional stress space relevant for cross-slip and relate our findings to the plastic behavior of monocrystalline fcc metals

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ID de Registro: 2687
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Identificador DOI: 10.1016/j.jmps.2007.06.014
URL Oficial:
Depositado por: Memoria Investigacion
Depositado el: 24 Mar 2010 11:53
Ultima Modificación: 06 Sep 2017 16:49
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