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Memorias de investigación
Artículos en revistas:
Linking atomistic, kinetic Monte Carlo and crystal plasticity simulations of single-crystal Tungsten strength
Año:2015
Áreas de investigación
  • Ingenierías
Datos
Descripción
Understanding and improving the mechanical properties of tungsten is a critical task for the materials fusion energy program. The plastic behavior in body-centered cubic (bcc) metals like tungsten is governed primarily by screw dislocations on the atomic scale and by ensembles and interactions of dislocations at larger scales. Modeling this behavior requires the application of methods capable of resolving each relevant scale. At the small scale, atomistic methods are used to study single dislocation properties, while at the coarse-scale, continuum models are used to cover the interactions between dislocations. In this work we present a multiscale model that comprises atomistic, kinetic Monte Carlo (kMC) and continuum-level crystal plasticity (CP) calculations. The function relating dislocation velocity to applied stress and temperature is obtained from the kMC model and it is used as the main source of constitutive information into a dislocation-based CP framework. The complete model is used to perform material point simulations of single-crystal tungsten strength. We explore the entire crystallographic orientation space of the standard triangle. Non-Schmid effects are inlcuded in the model by considering the twinning-antitwinning (T/AT) asymmetry in the kMC calculations. We consider the importance of ?1 1 1?{1 1 0} and ?1 1 1?{1 1 2} slip systems in the homologous temperature range from 0.08Tm to 0.33Tm, where Tm=3680 K is the melting point in tungsten.
Internacional
Si
JCR del ISI
Si
Título de la revista
GAMM-Mitteilungen
ISSN
1522-2608
Factor de impacto JCR
Información de impacto
Volumen
38
DOI
Número de revista
2
Desde la página
213
Hasta la página
227
Mes
SIN MES
Ranking
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Participantes
  • Autor: David Cereceda Señas (UPM)
  • Autor: M. Diehl
  • Autor: F. Roters
  • Autor: P. Shanthraj
  • Autor: D. Raabe
  • Autor: Jose Manuel Perlado Martin (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión
  • Centro o Instituto I+D+i: Instituto de Fusión Nuclear
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