Atomistically informed dislocation dynamics in fcc crystals

Martínez Sáez, Enrique and Marian, Jaime and Arsenlis, A. and Victoria, Maximo Pedro and 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. https://doi.org/10.1016/j.jmps.2007.06.014.

Description

Title: Atomistically informed dislocation dynamics in fcc crystals
Author/s:
  • Martínez Sáez, Enrique
  • Marian, Jaime
  • Arsenlis, A.
  • Victoria, Maximo Pedro
  • Perlado Martín, José Manuel
Item Type: Article
Título de Revista/Publicación: Journal of the Mechanics and Physics of Solids
Date: March 2008
ISSN: 0022-5096
Volume: 56
Subjects:
Freetext Keywords: Dislocation dynamics; fcc plasticity; cross-slip; dislocation locks; numerical methods
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Nuclear [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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

More information

Item ID: 2687
DC Identifier: http://oa.upm.es/2687/
OAI Identifier: oai:oa.upm.es:2687
DOI: 10.1016/j.jmps.2007.06.014
Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/220/description#description
Deposited by: Memoria Investigacion
Deposited on: 24 Mar 2010 11:53
Last Modified: 06 Sep 2017 16:49
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