Geometrically Necessary Dislocations on Plastic Deformation of Polycrystalline TRIP Steel [PDF]
Crystals, 2019 In this study, the main deformation behavior in terms of geometrically necessary dislocations (GND) was investigated on a transformation induced plasticity (TRIP) stainless steel by using sharp indentation at nanometric length scale.
Joan Josep Roa +4 more
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The Role of Geometrically Necessary Dislocations in Cantilever Beam Bending Experiments of Single Crystals [PDF]
Materials, 2017 The mechanical behavior of single crystalline, micro-sized copper is investigated in the context of cantilever beam bending experiments. Particular focus is on the role of geometrically necessary dislocations (GNDs) during bending-dominated load conditions and their impact on the characteristic bending size effect.
Swantje Bargmann
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Microhardness model based on geometrically necessary dislocations for heterogeneous material
Journal of Materials Research and Technology, 2021 Lamellar cast irons are known as heterogeneous materials. Their overall hardness is determined by the microhardness of their microstructure contents.
Mohammed Mendas +3 more
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Diffuse-interface polycrystal plasticity: expressing grain boundaries as geometrically necessary dislocations [PDF]
Materials Theory, 2017 The standard way of modeling plasticity in polycrystals is by using the crystal plasticity model for single crystals in each grain, and imposing suitable traction and slip boundary conditions across grain boundaries.
Nikhil Chandra Admal +2 more
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A non-local methodology for geometrically necessary dislocations and application to crack tips [PDF]
International Journal of Plasticity, 2021 Abstract A non-local method for the establishment of geometrically necessary dislocation (GND) based on a non-local domain integral has been developed and incorporated into crystal plasticity finite element (CPFE) formulations. The proposed non-local GND method has been validated through a four-point bending case, where the mesh sensitivity of the ...
YILUN Xu
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Determination of geometrically necessary dislocations in large shear strain localization in aluminum [PDF]
Acta Materialia, 2016 Abstract In this paper, a systematic approach is presented to quantifying shear band evolution by quantifying geometrically necessary dislocations (GND) associated with morphological anisotropy in 7039-aluminum alloy using the compact forced-simple shear (CFSS) design. A statistically motivated approach, i.e.
Chaoyi Zhu +2 more
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Trigonometric gradient microstructures in additively manufactured single crystals enable strength-ductility synergy and programmable performance [PDF]
Nature CommunicationsAdditively manufactured (AM) single crystals (SXs) show great promise for extreme-environment applications. AM process enhances gradient microstructures around dendrites, including dislocation densities, matrix channel width, precipitate area, and ...
Zixu Guo +9 more
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Geometrically necessary dislocations and strain-gradient plasticity: a few critical issues [PDF]
Scripta Materialia, 2003 Abstract A few issues related to the modeling of size effects in terms of geometrically necessary dislocations (GNDs) are critically discussed, viz. strain hardening, length scale dependence, types of GND arrays. Consequences are drawn regarding the continuum modeling of size effects in plasticity.
L P Kubín, A Mortensen
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Journal of Structural Geology, 2019 This study presents the first use of high-angular resolution electron backscatter diffraction (HR-EBSD) to quantitatively characterise geometrically necessary dislocations in quartz subgrain structures. HR-EBSD exploits cross-correlation of diffraction patterns to measure intragranular misorientations with precision on the order of 0.01° with well ...
David Wallis +2 more
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Crystal Orientation and Dislocation Slip
Metals, 2023 It is a widely held belief that dislocation slip has a direct effect on crystal orientation. Some of the confusion may be attributed to semantics when researchers are referring to related effects of dislocations on crystal orientation; either elastic ...
Malcolm Griffiths
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