A discrete dislocation plasticity analysis of grain-size strengthening

DS Balint; VS Deshpande; A Needleman; E Van der Giessen

doi:10.1016/j.msea.2005.02.082

A discrete dislocation plasticity analysis of grain-size strengthening

DS Balint^*, VS Deshpande, A Needleman, E Van der Giessen

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

46 Citations (Scopus)

323 Downloads (Pure)

Abstract

The dependence of shear yield strength on grain size is analyzed using discrete dislocation dynamics. Plastic deformation is modeled through the motion of edge dislocations in an elastic solid. The lattice resistance to dislocation motion, dislocation nucleation, dislocation interaction with obstacles and dislocation annihilation are incorporated through a set of constitutive rules. Grain boundaries are modeled as impenetrable to dislocations. Single slip is assumed within each grain and a checkerboard-like arrangement of grains is used as a unit cell for the polycrystal. Doubly-periodic pure shear calculations are carried out for planar polycrystals with grain sizes in the range 0.2 mu m

Original language	English
Pages (from-to)	186-190
Number of pages	5
Journal	Materials science and engineering a-Structural materials properties microstructure and processing
Volume	400
Issue number	6
DOIs	https://doi.org/10.1016/j.msea.2005.02.082
Publication status	Published - 25-Jul-2005
Event	Intenational Conference on Fundamentals of Plastic Deformation - , France Duration: 13-Sept-2004 → 17-Sept-2004

Keywords

discrete dislocations
mechanical properties
pure shear
plasticity
polycrystalline materials
computer simulations
SIMULATION
BEHAVIOR

Access to Document

10.1016/j.msea.2005.02.082

2005MaterSciEngABalint.pdfFinal publisher's version, 222 KB

Handle.net

Persistent link

Cite this

@article{eba673e2dfc44a5aa1f169e51ac2281d,

title = "A discrete dislocation plasticity analysis of grain-size strengthening",

abstract = "The dependence of shear yield strength on grain size is analyzed using discrete dislocation dynamics. Plastic deformation is modeled through the motion of edge dislocations in an elastic solid. The lattice resistance to dislocation motion, dislocation nucleation, dislocation interaction with obstacles and dislocation annihilation are incorporated through a set of constitutive rules. Grain boundaries are modeled as impenetrable to dislocations. Single slip is assumed within each grain and a checkerboard-like arrangement of grains is used as a unit cell for the polycrystal. Doubly-periodic pure shear calculations are carried out for planar polycrystals with grain sizes in the range 0.2 mu m",

keywords = "discrete dislocations, mechanical properties, pure shear, plasticity, polycrystalline materials, computer simulations, SIMULATION, BEHAVIOR",

author = "DS Balint and VS Deshpande and A Needleman and {Van der Giessen}, E",

year = "2005",

month = jul,

day = "25",

doi = "10.1016/j.msea.2005.02.082",

language = "English",

volume = "400",

pages = "186--190",

journal = "Materials Science and Engineering A",

issn = "0921-5093",

publisher = "Elsevier Science",

number = "6",

note = "Intenational Conference on Fundamentals of Plastic Deformation ; Conference date: 13-09-2004 Through 17-09-2004",

}

TY - JOUR

T1 - A discrete dislocation plasticity analysis of grain-size strengthening

AU - Balint, DS

AU - Deshpande, VS

AU - Needleman, A

AU - Van der Giessen, E

PY - 2005/7/25

Y1 - 2005/7/25

N2 - The dependence of shear yield strength on grain size is analyzed using discrete dislocation dynamics. Plastic deformation is modeled through the motion of edge dislocations in an elastic solid. The lattice resistance to dislocation motion, dislocation nucleation, dislocation interaction with obstacles and dislocation annihilation are incorporated through a set of constitutive rules. Grain boundaries are modeled as impenetrable to dislocations. Single slip is assumed within each grain and a checkerboard-like arrangement of grains is used as a unit cell for the polycrystal. Doubly-periodic pure shear calculations are carried out for planar polycrystals with grain sizes in the range 0.2 mu m

AB - The dependence of shear yield strength on grain size is analyzed using discrete dislocation dynamics. Plastic deformation is modeled through the motion of edge dislocations in an elastic solid. The lattice resistance to dislocation motion, dislocation nucleation, dislocation interaction with obstacles and dislocation annihilation are incorporated through a set of constitutive rules. Grain boundaries are modeled as impenetrable to dislocations. Single slip is assumed within each grain and a checkerboard-like arrangement of grains is used as a unit cell for the polycrystal. Doubly-periodic pure shear calculations are carried out for planar polycrystals with grain sizes in the range 0.2 mu m

KW - discrete dislocations

KW - mechanical properties

KW - pure shear

KW - plasticity

KW - polycrystalline materials

KW - computer simulations

KW - SIMULATION

KW - BEHAVIOR

U2 - 10.1016/j.msea.2005.02.082

DO - 10.1016/j.msea.2005.02.082

M3 - Article

SN - 0921-5093

VL - 400

SP - 186

EP - 190

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

IS - 6

T2 - Intenational Conference on Fundamentals of Plastic Deformation

Y2 - 13 September 2004 through 17 September 2004

ER -