Discrete dislocation modelling of submicron indentation

A Widjaja; E Van der Giessen; A Needleman

doi:10.1016/j.msea.2005.01.074

Discrete dislocation modelling of submicron indentation

A Widjaja, E Van der Giessen^*, A Needleman

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Indentation of a planar single crystal by a circular rigid indenter is analyzed using discrete dislocation plasticity. The crystal has three slip systems and is initially dislocation-free, but edge dislocations can nucleate from point sources inside the crystal. The lattice resistance to dislocation motion, the interaction with point obstacles and dislocation annihilation are incorporated through a set of constitutive rules. Indentation is displacement driven and at each stage of the loading history, a boundary-value problem is solved for the evolution of the indentation pressure and the contact size. Preliminary results are presented for various values of the density of dislocation sources. (c) 2005 Elsevier B.V. All rights reserved.

Originele taal-2	English
Pagina's (van-tot)	456-459
Aantal pagina's	4
Tijdschrift	Materials science and engineering a-Structural materials properties microstructure and processing
Volume	400
Nummer van het tijdschrift	6
DOI's	https://doi.org/10.1016/j.msea.2005.01.074
Status	Published - 25-jul.-2005
Evenement	Intenational Conference on Fundamentals of Plastic Deformation - , France Duur: 13-sep.-2004 → 17-sep.-2004

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title = "Discrete dislocation modelling of submicron indentation",

abstract = "Indentation of a planar single crystal by a circular rigid indenter is analyzed using discrete dislocation plasticity. The crystal has three slip systems and is initially dislocation-free, but edge dislocations can nucleate from point sources inside the crystal. The lattice resistance to dislocation motion, the interaction with point obstacles and dislocation annihilation are incorporated through a set of constitutive rules. Indentation is displacement driven and at each stage of the loading history, a boundary-value problem is solved for the evolution of the indentation pressure and the contact size. Preliminary results are presented for various values of the density of dislocation sources. (c) 2005 Elsevier B.V. All rights reserved.",

keywords = "discrete dislocations, nanoindentation, size effects, PLASTICITY, NANOINDENTATION, HARDNESS",

author = "A Widjaja and {Van der Giessen}, E and A Needleman",

year = "2005",

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day = "25",

doi = "10.1016/j.msea.2005.01.074",

language = "English",

volume = "400",

pages = "456--459",

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",

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TY - JOUR

T1 - Discrete dislocation modelling of submicron indentation

AU - Widjaja, A

AU - Van der Giessen, E

AU - Needleman, A

PY - 2005/7/25

Y1 - 2005/7/25

N2 - Indentation of a planar single crystal by a circular rigid indenter is analyzed using discrete dislocation plasticity. The crystal has three slip systems and is initially dislocation-free, but edge dislocations can nucleate from point sources inside the crystal. The lattice resistance to dislocation motion, the interaction with point obstacles and dislocation annihilation are incorporated through a set of constitutive rules. Indentation is displacement driven and at each stage of the loading history, a boundary-value problem is solved for the evolution of the indentation pressure and the contact size. Preliminary results are presented for various values of the density of dislocation sources. (c) 2005 Elsevier B.V. All rights reserved.

AB - Indentation of a planar single crystal by a circular rigid indenter is analyzed using discrete dislocation plasticity. The crystal has three slip systems and is initially dislocation-free, but edge dislocations can nucleate from point sources inside the crystal. The lattice resistance to dislocation motion, the interaction with point obstacles and dislocation annihilation are incorporated through a set of constitutive rules. Indentation is displacement driven and at each stage of the loading history, a boundary-value problem is solved for the evolution of the indentation pressure and the contact size. Preliminary results are presented for various values of the density of dislocation sources. (c) 2005 Elsevier B.V. All rights reserved.

KW - discrete dislocations

KW - nanoindentation

KW - size effects

KW - PLASTICITY

KW - NANOINDENTATION

KW - HARDNESS

U2 - 10.1016/j.msea.2005.01.074

DO - 10.1016/j.msea.2005.01.074

M3 - Article

VL - 400

SP - 456

EP - 459

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

SN - 0921-5093

IS - 6

T2 - Intenational Conference on Fundamentals of Plastic Deformation

Y2 - 13 September 2004 through 17 September 2004

ER -