TEM observations and finite element modelling of channel deformation in pre-irradiated austenitic stainless steels – Interactions with free surfaces and grain boundaries

Sauzay, Maxime; Bavard, Karine; Karlsen, Wade

doi:10.1016/j.jnucmat.2010.01.027

Cited by 39 publications

(31 citation statements)

References 43 publications

(100 reference statements)

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“…Most of the prior FE modeling efforts [78][79][80] have explicitly modeled dislocation channels in the material, i.e., explicitly embedded 'softer' shear bands in a 'harder' matrix. In contrast, we started out with a bulk consisting of uniformly distributed irradiation-induced defects and let the microstructure evolve according to constitutive rules based on the physics of the material behavior under mechanical loading.…”

Section: Discussionmentioning

confidence: 99%

Continuum modeling of localized deformation in irradiated bcc materials

Patra

McDowell

2013

Journal of Nuclear Materials

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Section: Discussionmentioning

confidence: 99%

Continuum modeling of localized deformation in irradiated bcc materials

Patra

McDowell

2013

Journal of Nuclear Materials

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“…In addition to the cellular microstructures at meso-scale, clear band formation and related plastic flow localization in irradiated materials (see e.g. Sauzay et al (2010)) at lower scales and macroscopic plastic slip bands such as Lüders bands (see e.g. Shaw and Kyriakides (1998)) are also commonly observed structures due to plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Non-convex rate dependent strain gradient crystal plasticity and deformation patterning

Yalçınkaya

Brekelmans

Geers

2012

International Journal of Solids and Structures

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a b s t r a c tA rate dependent strain gradient crystal plasticity framework is presented where the displacement and the plastic slip fields are considered as primary variables. These coupled fields are determined on a global level by solving simultaneously the linear momentum balance and the slip evolution equation, which is derived in a thermodynamically consistent manner. The formulation is based on the 1D theory presented in Yalcinkaya et al. (2011), where the patterning of plastic slip is obtained in a system with non-convex energetic hardening through a phenomenological double-well plastic potential. In the current multidimensional multi-slip analysis the non-convexity enters the framework through a latent hardening potential presented in Ortiz and Repettto (1999) where the microstructure evolution is obtained explicitly via a lamination procedure. The current study aims the implicit evolution of deformation patterns due to the incorporated physically based non-convex potential.

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“…The degree of stress concentration will decrease as distance from the SP increases, and the transformation will propagate along the surface until stress falls below some critical level. To estimate the actual acting stress, one may use micromechanical approaches (e.g., see [22,23]); however, as was noted above, in the case of the present work, 3D grain shape data are missing, so these approaches cannot provide accurate enough results.…”

Section: Resultsmentioning

confidence: 97%

“…Favorably oriented grains in appropriate grain configuration will form martensite at this strain level, but the same grains in other surrounding will not. True acting stress may be found using a micromechanical approach (finite-element modeling plus crystallographic orientation) [22,23]. However, to perform this task accurately, one needs to know the 3D geometry (real shape) of grains, which is unknown in the present work.…”

Section: Resultsmentioning

confidence: 99%